31311122121052 has 12 divisors (see below), whose sum is σ = 55488064518880. Its totient is φ = 15457389401376.

The previous prime is 31311122121023. The next prime is 31311122121053. The reversal of 31311122121052 is 25012122111313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311122121053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49542914433 + ... + 49542915064.

Almost surely, 2^{31311122121052} is an apocalyptic number.

It is an amenable number.

31311122121052 is a deficient number, since it is larger than the sum of its proper divisors (24176942397828).

31311122121052 is a wasteful number, since it uses less digits than its factorization.

31311122121052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99085829580 (or 99085829578 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

Adding to 31311122121052 its reverse (25012122111313), we get a palindrome (56323244232365).

The spelling of 31311122121052 in words is "thirty-one trillion, three hundred eleven billion, one hundred twenty-two million, one hundred twenty-one thousand, fifty-two".