3131220441242 has 4 divisors (see below), whose sum is σ = 4696830661866. Its totient is φ = 1565610220620.

The previous prime is 3131220441211. The next prime is 3131220441253. The reversal of 3131220441242 is 2421440221313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2762745946801 + 368474494441 = 1662151^2 + 607021^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782805110309 + ... + 782805110312.

Almost surely, 2^{3131220441242} is an apocalyptic number.

3131220441242 is a deficient number, since it is larger than the sum of its proper divisors (1565610220624).

3131220441242 is a wasteful number, since it uses less digits than its factorization.

3131220441242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565610220623.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 3131220441242 its reverse (2421440221313), we get a palindrome (5552660662555).

The spelling of 3131220441242 in words is "three trillion, one hundred thirty-one billion, two hundred twenty million, four hundred forty-one thousand, two hundred forty-two".