212220100111122 has 48 divisors (see below), whose sum is σ = 461108504184120. Its totient is φ = 70540412928000.

The previous prime is 212220100111099. The next prime is 212220100111127. The reversal of 212220100111122 is 221111001022212.

212220100111122 is a `hidden beast` number, since 212 + 220 + 1 + 0 + 0 + 111 + 122 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 212138613270441 + 81486840681 = 14564979^2 + 285459^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 212220100111095 and 212220100111104.

It is not an unprimeable number, because it can be changed into a prime (212220100111127) 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, 17115754 + ... + 26784122.

Almost surely, 2^{212220100111122} is an apocalyptic number.

212220100111122 is an abundant number, since it is smaller than the sum of its proper divisors (248888404072998).

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

212220100111122 is a wasteful number, since it uses less digits than its factorization.

212220100111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9671819 (or 9671816 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212220100111122 its reverse (221111001022212), we get a palindrome (433331101133334).

The spelling of 212220100111122 in words is "two hundred twelve trillion, two hundred twenty billion, one hundred million, one hundred eleven thousand, one hundred twenty-two".