100122221221221 has 4 divisors (see below), whose sum is σ = 133496294961632. Its totient is φ = 66748147480812.

The previous prime is 100122221221193. The next prime is 100122221221247. The reversal of 100122221221221 is 122122122221001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 100122221221221 - 2¹¹ = 100122221219173 is a prime.

It is a super-2 number, since 2×100122221221221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100122221221271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16687036870201 + ... + 16687036870206.

It is an arithmetic number, because the mean of its divisors is an integer number (33374073740408).

Almost surely, 2^{100122221221221} is an apocalyptic number.

It is an amenable number.

100122221221221 is a deficient number, since it is larger than the sum of its proper divisors (33374073740411).

100122221221221 is an equidigital number, since it uses as much as digits as its factorization.

100122221221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33374073740410.

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

Adding to 100122221221221 its reverse (122122122221001), we get a palindrome (222244343442222).

The spelling of 100122221221221 in words is "one hundred trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty-one".