131211211120442 has 16 divisors (see below), whose sum is σ = 201866444778600. Its totient is φ = 63926352034560.

The previous prime is 131211211120433. The next prime is 131211211120477. The reversal of 131211211120442 is 244021112112131.

It can be written as a sum of positive squares in 4 ways, for example, as 95253090933361 + 35958120187081 = 9759769^2 + 5996509^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 988893317 + ... + 989025992.

Almost surely, 2^{131211211120442} is an apocalyptic number.

131211211120442 is a deficient number, since it is larger than the sum of its proper divisors (70655233658158).

131211211120442 is a wasteful number, since it uses less digits than its factorization.

131211211120442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977920161.

The product of its (nonzero) digits is 768, while the sum is 26.

Adding to 131211211120442 its reverse (244021112112131), we get a palindrome (375232323232573).

The spelling of 131211211120442 in words is "one hundred thirty-one trillion, two hundred eleven billion, two hundred eleven million, one hundred twenty thousand, four hundred forty-two".