131211220031 has 8 divisors (see below), whose sum is σ = 135452876928. Its totient is φ = 126970128000.

The previous prime is 131211219949. The next prime is 131211220081. The reversal of 131211220031 is 130022112131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131211220031 - 2²⁶ = 131144111167 is a prime.

It is a super-2 number, since 2×131211220031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131211219991 and 131211220009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131211220081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359051 + ... + 625571.

It is an arithmetic number, because the mean of its divisors is an integer number (16931609616).

Almost surely, 2^131211220031 is an apocalyptic number.

131211220031 is a deficient number, since it is larger than the sum of its proper divisors (4241656897).

131211220031 is a wasteful number, since it uses less digits than its factorization.

131211220031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282433.

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

Adding to 131211220031 its reverse (130022112131), we get a palindrome (261233332162).

The spelling of 131211220031 in words is "one hundred thirty-one billion, two hundred eleven million, two hundred twenty thousand, thirty-one".