31134320121 has 16 divisors (see below), whose sum is σ = 42992805888. Its totient is φ = 20028464400.

The previous prime is 31134320089. The next prime is 31134320171. The reversal of 31134320121 is 12102343113.

It is not a de Polignac number, because 31134320121 - 2⁵ = 31134320089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31134320171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1544995 + ... + 1565016.

It is an arithmetic number, because the mean of its divisors is an integer number (2687050368).

Almost surely, 2^31134320121 is an apocalyptic number.

It is an amenable number.

31134320121 is a deficient number, since it is larger than the sum of its proper divisors (11858485767).

31134320121 is a wasteful number, since it uses less digits than its factorization.

31134320121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3110132.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31134320121 its reverse (12102343113), we get a palindrome (43236663234).

It can be divided in two parts, 3113 and 4320121, that added together give a palindrome (4323234).

The spelling of 31134320121 in words is "thirty-one billion, one hundred thirty-four million, three hundred twenty thousand, one hundred twenty-one".