31213141430121 has 36 divisors (see below), whose sum is σ = 52459011038772. Its totient is φ = 17831850188544.

The previous prime is 31213141430117. The next prime is 31213141430123. The reversal of 31213141430121 is 12103414131213.

31213141430121 is a `hidden beast` number, since 3 + 1 + 21 + 314 + 1 + 4 + 301 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12044821419225 + 19168320010896 = 3470565^2 + 4378164^2 .

It is not a de Polignac number, because 31213141430121 - 2² = 31213141430117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31213141430123) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6532300 + ... + 10251693.

It is an arithmetic number, because the mean of its divisors is an integer number (1457194751077).

Almost surely, 2^{31213141430121} is an apocalyptic number.

It is an amenable number.

31213141430121 is a deficient number, since it is larger than the sum of its proper divisors (21245869608651).

31213141430121 is a wasteful number, since it uses less digits than its factorization.

31213141430121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16788230 (or 16788220 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

Adding to 31213141430121 its reverse (12103414131213), we get a palindrome (43316555561334).

The spelling of 31213141430121 in words is "thirty-one trillion, two hundred thirteen billion, one hundred forty-one million, four hundred thirty thousand, one hundred twenty-one".