31001113021 has 8 divisors (see below), whose sum is σ = 31178000000. Its totient is φ = 30824686080.

The previous prime is 31001113019. The next prime is 31001113067. The reversal of 31001113021 is 12031110013.

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 31001113021 - 2¹ = 31001113019 is a prime.

It is a super-2 number, since 2×31001113021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31001112992 and 31001113010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31005113021) 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, 20605 + ... + 249853.

It is an arithmetic number, because the mean of its divisors is an integer number (3897250000).

Almost surely, 2^31001113021 is an apocalyptic number.

It is an amenable number.

31001113021 is a deficient number, since it is larger than the sum of its proper divisors (176886979).

31001113021 is a wasteful number, since it uses less digits than its factorization.

31001113021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230019.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 31001113021 its reverse (12031110013), we get a palindrome (43032223034).

The spelling of 31001113021 in words is "thirty-one billion, one million, one hundred thirteen thousand, twenty-one".