21031120004 has 12 divisors (see below), whose sum is σ = 37247887824. Its totient is φ = 10388866344.

The previous prime is 21031119997. The next prime is 21031120021. The reversal of 21031120004 is 40002113012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31673042 + ... + 31673705.

It is an arithmetic number, because the mean of its divisors is an integer number (3103990652).

Almost surely, 2^21031120004 is an apocalyptic number.

It is an amenable number.

21031120004 is a deficient number, since it is larger than the sum of its proper divisors (16216767820).

21031120004 is a wasteful number, since it uses less digits than its factorization.

21031120004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63346834 (or 63346832 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21031120004 its reverse (40002113012), we get a palindrome (61033233016).

The spelling of 21031120004 in words is "twenty-one billion, thirty-one million, one hundred twenty thousand, four".