131211212243231 has 16 divisors (see below), whose sum is σ = 139028654939328. Its totient is φ = 123404815872000.

The previous prime is 131211212243173. The next prime is 131211212243249. The reversal of 131211212243231 is 132342212112131.

It is not a de Polignac number, because 131211212243231 - 2⁴⁶ = 60842468065567 is a prime.

It is a super-2 number, since 2×131211212243231² (a number of 29 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 = 131211212243194 and 131211212243203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131211212243291) 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, 134863691 + ... + 135833123.

It is an arithmetic number, because the mean of its divisors is an integer number (8689290933708).

Almost surely, 2^{131211212243231} is an apocalyptic number.

131211212243231 is a deficient number, since it is larger than the sum of its proper divisors (7817442696097).

131211212243231 is a wasteful number, since it uses less digits than its factorization.

131211212243231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975122.

The product of its digits is 3456, while the sum is 29.

Adding to 131211212243231 its reverse (132342212112131), we get a palindrome (263553424355362).

The spelling of 131211212243231 in words is "one hundred thirty-one trillion, two hundred eleven billion, two hundred twelve million, two hundred forty-three thousand, two hundred thirty-one".