21113001004 has 12 divisors (see below), whose sum is σ = 37848916728. Its totient is φ = 10299024800.

The previous prime is 21113000999. The next prime is 21113001047. The reversal of 21113001004 is 40010031112.

It is a super-2 number, since 2×21113001004² (a number of 21 digits) contains 22 as substring.

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, 64368742 + ... + 64369069.

It is an arithmetic number, because the mean of its divisors is an integer number (3154076394).

Almost surely, 2^21113001004 is an apocalyptic number.

It is an amenable number.

21113001004 is a deficient number, since it is larger than the sum of its proper divisors (16735915724).

21113001004 is a wasteful number, since it uses less digits than its factorization.

21113001004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128737856 (or 128737854 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21113001004 its reverse (40010031112), we get a palindrome (61123032116).

The spelling of 21113001004 in words is "twenty-one billion, one hundred thirteen million, one thousand, four".