21032124212 has 24 divisors (see below), whose sum is σ = 40520615520. Its totient is φ = 9472347360.

The previous prime is 21032124151. The next prime is 21032124229. The reversal of 21032124212 is 21242123012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2187878 + ... + 2197469.

It is an arithmetic number, because the mean of its divisors is an integer number (1688358980).

Almost surely, 2^21032124212 is an apocalyptic number.

21032124212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21032124212 is a deficient number, since it is larger than the sum of its proper divisors (19488491308).

21032124212 is a wasteful number, since it uses less digits than its factorization.

21032124212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4385471 (or 4385469 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21032124212 its reverse (21242123012), we get a palindrome (42274247224).

The spelling of 21032124212 in words is "twenty-one billion, thirty-two million, one hundred twenty-four thousand, two hundred twelve".