21021020011122 has 16 divisors (see below), whose sum is σ = 42634181431872. Its totient is φ = 6908316435440.

The previous prime is 21021020011097. The next prime is 21021020011129. The reversal of 21021020011122 is 22111002012012.

It is not an unprimeable number, because it can be changed into a prime (21021020011129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24672558273 + ... + 24672559124.

It is an arithmetic number, because the mean of its divisors is an integer number (2664636339492).

Almost surely, 2^{21021020011122} is an apocalyptic number.

21021020011122 is an abundant number, since it is smaller than the sum of its proper divisors (21613161420750).

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

21021020011122 is a wasteful number, since it uses less digits than its factorization.

21021020011122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49345117473.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21021020011122 its reverse (22111002012012), we get a palindrome (43132022023134).

The spelling of 21021020011122 in words is "twenty-one trillion, twenty-one billion, twenty million, eleven thousand, one hundred twenty-two".