21122021111012 has 24 divisors (see below), whose sum is σ = 36974491993152. Its totient is φ = 10557880906400.

The previous prime is 21122021110999. The next prime is 21122021111047. The reversal of 21122021111012 is 21011112022112.

It is a super-2 number, since 2×21122021111012² (a number of 27 digits) contains 22 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, 302092337 + ... + 302162247.

It is an arithmetic number, because the mean of its divisors is an integer number (1540603833048).

Almost surely, 2^{21122021111012} is an apocalyptic number.

It is an amenable number.

21122021111012 is a deficient number, since it is larger than the sum of its proper divisors (15852470882140).

21122021111012 is a wasteful number, since it uses less digits than its factorization.

21122021111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91219 (or 91217 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21122021111012 its reverse (21011112022112), we get a palindrome (42133133133124).

The spelling of 21122021111012 in words is "twenty-one trillion, one hundred twenty-two billion, twenty-one million, one hundred eleven thousand, twelve".