21234013100 has 36 divisors (see below), whose sum is σ = 46097950584. Its totient is φ = 8489892480.

The previous prime is 21234013091. The next prime is 21234013169. The reversal of 21234013100 is 131043212.

It is a super-2 number, since 2×21234013100² (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 11 ways as a sum of consecutive naturals, for example, 189464 + ... + 279936.

Almost surely, 2^21234013100 is an apocalyptic number.

21234013100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21234013100 is an abundant number, since it is smaller than the sum of its proper divisors (24863937484).

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

21234013100 is a wasteful number, since it uses less digits than its factorization.

21234013100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92834 (or 92827 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21234013100 its reverse (131043212), we get a palindrome (21365056312).

The spelling of 21234013100 in words is "twenty-one billion, two hundred thirty-four million, thirteen thousand, one hundred".