131220211301 has 4 divisors (see below), whose sum is σ = 131222225004. Its totient is φ = 131218197600.

The previous prime is 131220211231. The next prime is 131220211327. The reversal of 131220211301 is 103112022131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 115871479201 + 15348732100 = 340399^2 + 123890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131220211301 is a prime.

It is a super-2 number, since 2×131220211301² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131220211301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131220211901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 905720 + ... + 1040561.

It is an arithmetic number, because the mean of its divisors is an integer number (32805556251).

Almost surely, 2^131220211301 is an apocalyptic number.

It is an amenable number.

131220211301 is a deficient number, since it is larger than the sum of its proper divisors (2013703).

131220211301 is an equidigital number, since it uses as much as digits as its factorization.

131220211301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2013702.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 131220211301 its reverse (103112022131), we get a palindrome (234332233432).

The spelling of 131220211301 in words is "one hundred thirty-one billion, two hundred twenty million, two hundred eleven thousand, three hundred one".