21000020211022 has 16 divisors (see below), whose sum is σ = 31525867848960. Its totient is φ = 10491398651448.

The previous prime is 21000020211019. The next prime is 21000020211031. The reversal of 21000020211022 is 22011202000012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21000020210993 and 21000020211011.

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, 40793629 + ... + 41305207.

It is an arithmetic number, because the mean of its divisors is an integer number (1970366740560).

Almost surely, 2^{21000020211022} is an apocalyptic number.

21000020211022 is a deficient number, since it is larger than the sum of its proper divisors (10525847637938).

21000020211022 is a wasteful number, since it uses less digits than its factorization.

21000020211022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528375.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21000020211022 its reverse (22011202000012), we get a palindrome (43011222211034).

The spelling of 21000020211022 in words is "twenty-one trillion, twenty million, two hundred eleven thousand, twenty-two".