21000012001022 has 8 divisors (see below), whose sum is σ = 31500064176672. Its totient is φ = 10499990608800.

The previous prime is 21000012000973. The next prime is 21000012001091. The reversal of 21000012001022 is 22010021000012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21000012000994 and 21000012001012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5907254 + ... + 8769017.

It is an arithmetic number, because the mean of its divisors is an integer number (3937508022084).

Almost surely, 2^{21000012001022} is an apocalyptic number.

21000012001022 is a deficient number, since it is larger than the sum of its proper divisors (10500052175650).

21000012001022 is a wasteful number, since it uses less digits than its factorization.

21000012001022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15391714.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21000012001022 its reverse (22010021000012), we get a palindrome (43010033001034).

The spelling of 21000012001022 in words is "twenty-one trillion, twelve million, one thousand, twenty-two".