131211222010042 has 24 divisors (see below), whose sum is σ = 208690683011100. Its totient is φ = 61798388789760.

The previous prime is 131211222010007. The next prime is 131211222010051. The reversal of 131211222010042 is 240010222112131.

It can be written as a sum of positive squares in 6 ways, for example, as 12623673986361 + 118587548023681 = 3552981^2 + 10889791^2 .

It is a junction number, because it is equal to n+sod(n) for n = 131211222009995 and 131211222010022.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 672794367 + ... + 672989362.

Almost surely, 2^{131211222010042} is an apocalyptic number.

131211222010042 is a deficient number, since it is larger than the sum of its proper divisors (77479461001058).

131211222010042 is a wasteful number, since it uses less digits than its factorization.

131211222010042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345783842 (or 1345783801 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 131211222010042 its reverse (240010222112131), we get a palindrome (371221444122173).

The spelling of 131211222010042 in words is "one hundred thirty-one trillion, two hundred eleven billion, two hundred twenty-two million, ten thousand, forty-two".