100221121012121 has 8 divisors (see below), whose sum is σ = 100726444728000. Its totient is φ = 99715814296560.

The previous prime is 100221121012043. The next prime is 100221121012123. The reversal of 100221121012121 is 121210121122001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100221121012121 - 2²² = 100221116817817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100221121012121.

It is not an unprimeable number, because it can be changed into a prime (100221121012123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7653986 + ... + 16094276.

It is an arithmetic number, because the mean of its divisors is an integer number (12590805591000).

Almost surely, 2^{100221121012121} is an apocalyptic number.

It is an amenable number.

100221121012121 is a deficient number, since it is larger than the sum of its proper divisors (505323715879).

100221121012121 is an equidigital number, since it uses as much as digits as its factorization.

100221121012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8500159.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 100221121012121 its reverse (121210121122001), we get a palindrome (221431242134122).

The spelling of 100221121012121 in words is "one hundred trillion, two hundred twenty-one billion, one hundred twenty-one million, twelve thousand, one hundred twenty-one".