222100012122210 has 48 divisors (see below), whose sum is σ = 593067059405496. Its totient is φ = 57625949090304.

The previous prime is 222100012122181. The next prime is 222100012122217. The reversal of 222100012122210 is 12221210001222.

It is a happy number.

222100012122210 is a `hidden beast` number, since 22 + 210 + 0 + 0 + 1 + 212 + 221 + 0 = 666.

222100012122210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 221493777032889 + 606235089321 = 14882667^2 + 778611^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (222100012122217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33348346839 + ... + 33348353498.

Almost surely, 2^{222100012122210} is an apocalyptic number.

222100012122210 is an abundant number, since it is smaller than the sum of its proper divisors (370967047283286).

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

222100012122210 is a wasteful number, since it uses less digits than its factorization.

222100012122210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66696700387 (or 66696700384 counting only the distinct ones).

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

Adding to 222100012122210 its reverse (12221210001222), we get a palindrome (234321222123432).

It can be divided in two parts, 222100012 and 122210, that added together give a palindrome (222222222).

The spelling of 222100012122210 in words is "two hundred twenty-two trillion, one hundred billion, twelve million, one hundred twenty-two thousand, two hundred ten".