21000000011022 has 32 divisors (see below), whose sum is σ = 47102803776000. Its totient is φ = 6934579440984.

The previous prime is 21000000011009. The next prime is 21000000011027. The reversal of 21000000011022 is 22011000000012.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 21000000010995 and 21000000011013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000000011027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1817232022 + ... + 1817243577.

It is an arithmetic number, because the mean of its divisors is an integer number (1471962618000).

Almost surely, 2^{21000000011022} is an apocalyptic number.

21000000011022 is an abundant number, since it is smaller than the sum of its proper divisors (26102803764978).

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

21000000011022 is a wasteful number, since it uses less digits than its factorization.

21000000011022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3634475717 (or 3634475711 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 21000000011022 its reverse (22011000000012), we get a palindrome (43011000011034).

The spelling of 21000000011022 in words is "twenty-one trillion, eleven thousand, twenty-two".