21222212020110 has 96 divisors (see below), whose sum is σ = 55265652505440. Its totient is φ = 5650247522304.

The previous prime is 21222212020091. The next prime is 21222212020171. The reversal of 21222212020110 is 1102021222212.

It is a happy number.

21222212020110 is a `hidden beast` number, since 21 + 222 + 212 + 0 + 201 + 10 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 160066326 + ... + 160198854.

It is an arithmetic number, because the mean of its divisors is an integer number (575683880265).

Almost surely, 2^{21222212020110} is an apocalyptic number.

21222212020110 is an abundant number, since it is smaller than the sum of its proper divisors (34043440485330).

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

21222212020110 is a wasteful number, since it uses less digits than its factorization.

21222212020110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135362 (or 135359 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21222212020110 its reverse (1102021222212), we get a palindrome (22324233242322).

The spelling of 21222212020110 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twelve million, twenty thousand, one hundred ten".