131211122111212 has 48 divisors (see below), whose sum is σ = 269787001075200. Its totient is φ = 55048663690560.

The previous prime is 131211122111177. The next prime is 131211122111213. The reversal of 131211122111212 is 212111221112131.

It is a super-2 number, since 2×131211122111212² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (131211122111213) 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, 3955162 + ... + 16675297.

It is an arithmetic number, because the mean of its divisors is an integer number (5620562522400).

Almost surely, 2^{131211122111212} is an apocalyptic number.

It is an amenable number.

131211122111212 is an abundant number, since it is smaller than the sum of its proper divisors (138575878963988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131211122111212 is a wasteful number, since it uses less digits than its factorization.

131211122111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20641606 (or 20641604 counting only the distinct ones).

The product of its digits is 96, while the sum is 22.

Adding to 131211122111212 its reverse (212111221112131), we get a palindrome (343322343223343).

It can be divided in two parts, 1 and 31211122111212, that added together give a palindrome (31211122111213).

The spelling of 131211122111212 in words is "one hundred thirty-one trillion, two hundred eleven billion, one hundred twenty-two million, one hundred eleven thousand, two hundred twelve".