100100221202121 has 16 divisors (see below), whose sum is σ = 159165569117184. Its totient is φ = 54713164383504.

The previous prime is 100100221202077. The next prime is 100100221202123. The reversal of 100100221202121 is 121202122001001.

It is not a de Polignac number, because 100100221202121 - 2⁶ = 100100221202057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100100221202121.

It is not an unprimeable number, because it can be changed into a prime (100100221202123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103623416911 + ... + 103623417876.

It is an arithmetic number, because the mean of its divisors is an integer number (9947848069824).

Almost surely, 2^{100100221202121} is an apocalyptic number.

It is an amenable number.

100100221202121 is a deficient number, since it is larger than the sum of its proper divisors (59065347915063).

100100221202121 is a wasteful number, since it uses less digits than its factorization.

100100221202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207246834820.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 100100221202121 its reverse (121202122001001), we get a palindrome (221302343203122).

The spelling of 100100221202121 in words is "one hundred trillion, one hundred billion, two hundred twenty-one million, two hundred two thousand, one hundred twenty-one".