21021111023312 has 40 divisors (see below), whose sum is σ = 41132377454592. Its totient is φ = 10406307600000.

The previous prime is 21021111023249. The next prime is 21021111023329. The reversal of 21021111023312 is 21332011112012.

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, 170832113 + ... + 170955119.

Almost surely, 2^{21021111023312} is an apocalyptic number.

It is an amenable number.

21021111023312 is a deficient number, since it is larger than the sum of its proper divisors (20111266431280).

21021111023312 is a wasteful number, since it uses less digits than its factorization.

21021111023312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228867 (or 228861 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21021111023312 its reverse (21332011112012), we get a palindrome (42353122135324).

The spelling of 21021111023312 in words is "twenty-one trillion, twenty-one billion, one hundred eleven million, twenty-three thousand, three hundred twelve".