21222222110102 has 24 divisors (see below), whose sum is σ = 34955912847600. Its totient is φ = 9656915792160.

The previous prime is 21222222110057. The next prime is 21222222110129. The reversal of 21222222110102 is 20101122222212.

It is a super-2 number, since 2×21222222110102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 442142477 + ... + 442190472.

It is an arithmetic number, because the mean of its divisors is an integer number (1456496368650).

Almost surely, 2^{21222222110102} is an apocalyptic number.

21222222110102 is a deficient number, since it is larger than the sum of its proper divisors (13733690737498).

21222222110102 is a wasteful number, since it uses less digits than its factorization.

21222222110102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884333048 (or 884333035 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21222222110102 its reverse (20101122222212), we get a palindrome (41323344332314).

It can be divided in two parts, 21222222110 and 102, that added together give a palindrome (21222222212).

The spelling of 21222222110102 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty-two million, one hundred ten thousand, one hundred two".