131211211133442 has 128 divisors (see below), whose sum is σ = 297716655513600. Its totient is φ = 38191913856000.

The previous prime is 131211211133381. The next prime is 131211211133581. The reversal of 131211211133442 is 244331112112131.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 414748173 + ... + 415064415.

It is an arithmetic number, because the mean of its divisors is an integer number (2325911371200).

Almost surely, 2^{131211211133442} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131211211133442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148858327756800).

131211211133442 is an abundant number, since it is smaller than the sum of its proper divisors (166505444380158).

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

131211211133442 is a wasteful number, since it uses less digits than its factorization.

131211211133442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317800.

The product of its digits is 3456, while the sum is 30.

Adding to 131211211133442 its reverse (244331112112131), we get a palindrome (375542323245573).

The spelling of 131211211133442 in words is "one hundred thirty-one trillion, two hundred eleven billion, two hundred eleven million, one hundred thirty-three thousand, four hundred forty-two".