21221010000010 has 32 divisors (see below), whose sum is σ = 38300325497280. Its totient is φ = 8465639194368.

The previous prime is 21221009999989. The next prime is 21221010000101. The reversal of 21221010000010 is 1000001012212.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10704061 + ... + 12530719.

It is an arithmetic number, because the mean of its divisors is an integer number (1196885171790).

Almost surely, 2^{21221010000010} is an apocalyptic number.

21221010000010 is a deficient number, since it is larger than the sum of its proper divisors (17079315497270).

21221010000010 is a wasteful number, since it uses less digits than its factorization.

21221010000010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829782.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21221010000010 its reverse (1000001012212), we get a palindrome (22221011012222).

The spelling of 21221010000010 in words is "twenty-one trillion, two hundred twenty-one billion, ten million, ten", and thus it is an aban number.