21222110100102 has 32 divisors (see below), whose sum is σ = 43591653323232. Its totient is φ = 6882800408064.

The previous prime is 21222110100089. The next prime is 21222110100131. The reversal of 21222110100102 is 20100101122212.

It is a congruent number.

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, 52388478 + ... + 52792014.

It is an arithmetic number, because the mean of its divisors is an integer number (1362239166351).

Almost surely, 2^{21222110100102} is an apocalyptic number.

21222110100102 is an abundant number, since it is smaller than the sum of its proper divisors (22369543223130).

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

21222110100102 is a wasteful number, since it uses less digits than its factorization.

21222110100102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640472.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21222110100102 its reverse (20100101122212), we get a palindrome (41322211222314).

The spelling of 21222110100102 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred ten million, one hundred thousand, one hundred two".