21020332012 has 24 divisors (see below), whose sum is σ = 37035808992. Its totient is φ = 10438915200.

The previous prime is 21020332001. The next prime is 21020332043. The reversal of 21020332012 is 21023302012.

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, 319498 + ... + 379630.

It is an arithmetic number, because the mean of its divisors is an integer number (1543158708).

Almost surely, 2^21020332012 is an apocalyptic number.

It is an amenable number.

21020332012 is a deficient number, since it is larger than the sum of its proper divisors (16015476980).

21020332012 is a wasteful number, since it uses less digits than its factorization.

21020332012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60729 (or 60727 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21020332012 its reverse (21023302012), we get a palindrome (42043634024).

The spelling of 21020332012 in words is "twenty-one billion, twenty million, three hundred thirty-two thousand, twelve".