21021032130312 has 32 divisors (see below), whose sum is σ = 52816663656000. Its totient is φ = 6971799599424.

The previous prime is 21021032130269. The next prime is 21021032130433. The reversal of 21021032130312 is 21303123012012.

It is a super-3 number, since 3×21021032130312³ (a number of 41 digits) contains 333 as substring.

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, 2200689543 + ... + 2200699094.

It is an arithmetic number, because the mean of its divisors is an integer number (1650520739250).

Almost surely, 2^{21021032130312} is an apocalyptic number.

It is an amenable number.

21021032130312 is an abundant number, since it is smaller than the sum of its proper divisors (31795631525688).

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

21021032130312 is a wasteful number, since it uses less digits than its factorization.

21021032130312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4401388845 (or 4401388841 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21021032130312 its reverse (21303123012012), we get a palindrome (42324155142324).

The spelling of 21021032130312 in words is "twenty-one trillion, twenty-one billion, thirty-two million, one hundred thirty thousand, three hundred twelve".