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1220200111 = 13224129959
BaseRepresentation
bin100100010111010…
…1100011010101111
310011001000120212201
41020232230122233
54444332400421
6321025042331
742144346504
oct11056543257
93131016781
101220200111
11576853449
122a07863a7
13165a47a00
14b80ab4ab
15721cab91
hex48bac6af

1220200111 has 12 divisors (see below), whose sum is σ = 1326808560. Its totient is φ = 1121627520.

The previous prime is 1220200099. The next prime is 1220200127. The reversal of 1220200111 is 1110020221.

It is not a de Polignac number, because 1220200111 - 27 = 1220199983 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 (1220200411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25750 + ... + 55708.

It is an arithmetic number, because the mean of its divisors is an integer number (110567380).

Almost surely, 21220200111 is an apocalyptic number.

1220200111 is a deficient number, since it is larger than the sum of its proper divisors (106608449).

1220200111 is a wasteful number, since it uses less digits than its factorization.

1220200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30226 (or 30213 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1220200111 is about 34931.3628563215. The cubic root of 1220200111 is about 1068.5881489639.

Adding to 1220200111 its reverse (1110020221), we get a palindrome (2330220332).

The spelling of 1220200111 in words is "one billion, two hundred twenty million, two hundred thousand, one hundred eleven".

Divisors: 1 13 169 241 3133 29959 40729 389467 5063071 7220119 93861547 1220200111