31003100421 has 16 divisors (see below), whose sum is σ = 43490182848. Its totient is φ = 19619625600.

The previous prime is 31003100419. The next prime is 31003100423. The reversal of 31003100421 is 12400130013.

It is an interprime number because it is at equal distance from previous prime (31003100419) and next prime (31003100423).

It is not a de Polignac number, because 31003100421 - 2¹ = 31003100419 is a prime.

It is a super-2 number, since 2×31003100421² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31003100421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31003100423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3401635 + ... + 3410736.

It is an arithmetic number, because the mean of its divisors is an integer number (2718136428).

Almost surely, 2^31003100421 is an apocalyptic number.

It is an amenable number.

31003100421 is a deficient number, since it is larger than the sum of its proper divisors (12487082427).

31003100421 is a wasteful number, since it uses less digits than its factorization.

31003100421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6812452.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31003100421 its reverse (12400130013), we get a palindrome (43403230434).

The spelling of 31003100421 in words is "thirty-one billion, three million, one hundred thousand, four hundred twenty-one".