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131201142210221 = 12746119483115021
BaseRepresentation
bin11101110101001110100101…
…011110011011111010101101
3122012112201002011222200121112
4131311032211132123322231
5114144044414401211341
61143012550032041405
736430653420062456
oct3565164536337255
9565481064880545
10131201142210221
1138894101409806
121286b7b1093265
1358292a36ac415
14245825229212d
151027c996a6aeb
hex7753a579bead

131201142210221 has 16 divisors (see below), whose sum is σ = 132529018288128. Its totient is φ = 129877906334400.

The previous prime is 131201142210157. The next prime is 131201142210233. The reversal of 131201142210221 is 122012241102131.

It is a cyclic number.

It is not a de Polignac number, because 131201142210221 - 26 = 131201142210157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131201142210121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1140613691 + ... + 1140728711.

It is an arithmetic number, because the mean of its divisors is an integer number (8283063643008).

Almost surely, 2131201142210221 is an apocalyptic number.

It is an amenable number.

131201142210221 is a deficient number, since it is larger than the sum of its proper divisors (1327876077907).

131201142210221 is a wasteful number, since it uses less digits than its factorization.

131201142210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135092.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 131201142210221 its reverse (122012241102131), we get a palindrome (253213383312352).

The spelling of 131201142210221 in words is "one hundred thirty-one trillion, two hundred one billion, one hundred forty-two million, two hundred ten thousand, two hundred twenty-one".

Divisors: 1 127 461 19483 58547 115021 2474341 8981663 14607667 53024681 1140671201 2240954143 6734134487 284601176161 1033079859923 131201142210221