31213121012199 has 24 divisors (see below), whose sum is σ = 51526839435552. Its totient is φ = 17835924648960.

The previous prime is 31213121012189. The next prime is 31213121012239. The reversal of 31213121012199 is 99121012131213.

31213121012199 is a `hidden beast` number, since 3 + 1 + 21 + 312 + 101 + 219 + 9 = 666.

It is not a de Polignac number, because 31213121012199 - 2⁷ = 31213121012071 is a prime.

It is a super-3 number, since 3×31213121012199³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213121012179) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6088087 + ... + 9974519.

It is an arithmetic number, because the mean of its divisors is an integer number (2146951643148).

Almost surely, 2^{31213121012199} is an apocalyptic number.

31213121012199 is a deficient number, since it is larger than the sum of its proper divisors (20313718423353).

31213121012199 is a wasteful number, since it uses less digits than its factorization.

31213121012199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4013927 (or 4013924 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The spelling of 31213121012199 in words is "thirty-one trillion, two hundred thirteen billion, one hundred twenty-one million, twelve thousand, one hundred ninety-nine".