31121310133102 has 16 divisors (see below), whose sum is σ = 53374206648672. Its totient is φ = 13331857023360.

The previous prime is 31121310133097. The next prime is 31121310133103. The reversal of 31121310133102 is 20133101312113.

It is a super-2 number, since 2×31121310133102² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31121310133103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487243543 + ... + 487307410.

It is an arithmetic number, because the mean of its divisors is an integer number (3335887915542).

Almost surely, 2^{31121310133102} is an apocalyptic number.

31121310133102 is a deficient number, since it is larger than the sum of its proper divisors (22252896515570).

31121310133102 is a wasteful number, since it uses less digits than its factorization.

31121310133102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974553243.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 31121310133102 its reverse (20133101312113), we get a palindrome (51254411445215).

The spelling of 31121310133102 in words is "thirty-one trillion, one hundred twenty-one billion, three hundred ten million, one hundred thirty-three thousand, one hundred two".