100556212122 has 12 divisors (see below), whose sum is σ = 217871792970. Its totient is φ = 33518737368.

The previous prime is 100556212103. The next prime is 100556212147. The reversal of 100556212122 is 221212655001.

100556212122 is a `hidden beast` number, since 10 + 0 + 5 + 5 + 621 + 2 + 1 + 22 = 666.

It can be written as a sum of positive squares in only one way, i.e., 94764849921 + 5791362201 = 307839^2 + 76101^2 .

It is a super-2 number, since 2×100556212122² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2793228097 + ... + 2793228132.

Almost surely, 2^100556212122 is an apocalyptic number.

100556212122 is an abundant number, since it is smaller than the sum of its proper divisors (117315580848).

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

100556212122 is a wasteful number, since it uses less digits than its factorization.

100556212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5586456237 (or 5586456234 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 100556212122 its reverse (221212655001), we get a palindrome (321768867123).

The spelling of 100556212122 in words is "one hundred billion, five hundred fifty-six million, two hundred twelve thousand, one hundred twenty-two".