100221222012122 has 4 divisors (see below), whose sum is σ = 150331833018186. Its totient is φ = 50110611006060.

The previous prime is 100221222012097. The next prime is 100221222012221. The reversal of 100221222012122 is 221210222122001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 74245778326801 + 25975443685321 = 8616599^2 + 5096611^2 .

It is a junction number, because it is equal to n+sod(n) for n = 100221222012094 and 100221222012103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25055305503029 + ... + 25055305503032.

Almost surely, 2^{100221222012122} is an apocalyptic number.

100221222012122 is a deficient number, since it is larger than the sum of its proper divisors (50110611006064).

100221222012122 is an equidigital number, since it uses as much as digits as its factorization.

100221222012122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50110611006063.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 100221222012122 its reverse (221210222122001), we get a palindrome (321431444134123).

The spelling of 100221222012122 in words is "one hundred trillion, two hundred twenty-one billion, two hundred twenty-two million, twelve thousand, one hundred twenty-two".