21121103000 has 64 divisors (see below), whose sum is σ = 52024658400. Its totient is φ = 8003779200.

The previous prime is 21121102969. The next prime is 21121103011. The reversal of 21121103000 is 30112112.

It is a super-2 number, since 2×21121103000² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 536819 + ... + 574818.

Almost surely, 2^21121103000 is an apocalyptic number.

21121103000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21121103000 is an abundant number, since it is smaller than the sum of its proper divisors (30903555400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21121103000 is a wasteful number, since it uses less digits than its factorization.

21121103000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111677 (or 1111663 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21121103000 its reverse (30112112), we get a palindrome (21151215112).

The spelling of 21121103000 in words is "twenty-one billion, one hundred twenty-one million, one hundred three thousand".