31019121005 has 8 divisors (see below), whose sum is σ = 38841334272. Its totient is φ = 23736370768.

The previous prime is 31019120953. The next prime is 31019121031. The reversal of 31019121005 is 50012191013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31019121005 - 2²⁰ = 31018072429 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 134865629 + ... + 134865858.

It is an arithmetic number, because the mean of its divisors is an integer number (4855166784).

Almost surely, 2^31019121005 is an apocalyptic number.

It is an amenable number.

31019121005 is a deficient number, since it is larger than the sum of its proper divisors (7822213267).

31019121005 is a wasteful number, since it uses less digits than its factorization.

31019121005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269731515.

The product of its (nonzero) digits is 270, while the sum is 23.

The spelling of 31019121005 in words is "thirty-one billion, nineteen million, one hundred twenty-one thousand, five".