21222222110000 has 100 divisors (see below), whose sum is σ = 53038578272064. Its totient is φ = 8215053600000.

The previous prime is 21222222109987. The next prime is 21222222110027. The reversal of 21222222110000 is 1122222212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (100).

It is a super-2 number, since 2×21222222110000² (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 19 ways as a sum of consecutive naturals, for example, 33919391 + ... + 34539390.

Almost surely, 2^{21222222110000} is an apocalyptic number.

21222222110000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222222110000 is an abundant number, since it is smaller than the sum of its proper divisors (31816356162064).

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

21222222110000 is an equidigital number, since it uses as much as digits as its factorization.

21222222110000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68458840 (or 68458819 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21222222110000 its reverse (1122222212), we get a palindrome (21223344332212).

It can be divided in two parts, 21222 and 222110000, that added together give a palindrome (222131222).

The spelling of 21222222110000 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty-two million, one hundred ten thousand".