100112222221221 has 32 divisors (see below), whose sum is σ = 156221347138560. Its totient is φ = 55833036989184.

The previous prime is 100112222221213. The next prime is 100112222221259. The reversal of 100112222221221 is 122122222211001.

It is not a de Polignac number, because 100112222221221 - 2³ = 100112222221213 is a prime.

It is a super-2 number, since 2×100112222221221² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100112222221211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42047316 + ... + 44364413.

It is an arithmetic number, because the mean of its divisors is an integer number (4881917098080).

Almost surely, 2^{100112222221221} is an apocalyptic number.

It is an amenable number.

100112222221221 is a deficient number, since it is larger than the sum of its proper divisors (56109124917339).

100112222221221 is a wasteful number, since it uses less digits than its factorization.

100112222221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86413065.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 100112222221221 its reverse (122122222211001), we get a palindrome (222234444432222).

The spelling of 100112222221221 in words is "one hundred trillion, one hundred twelve billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty-one".