102100221200121 has 16 divisors (see below), whose sum is σ = 144162752184000. Its totient is φ = 64053433476608.

The previous prime is 102100221200113. The next prime is 102100221200167. The reversal of 102100221200121 is 121002122001201.

It is a cyclic number.

It is not a de Polignac number, because 102100221200121 - 2³ = 102100221200113 is a prime.

It is a super-2 number, since 2×102100221200121² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102100221200121.

It is not an unprimeable number, because it can be changed into a prime (102100221200111) 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, 147313596 + ... + 148005053.

It is an arithmetic number, because the mean of its divisors is an integer number (9010172011500).

Almost surely, 2^{102100221200121} is an apocalyptic number.

It is an amenable number.

102100221200121 is a deficient number, since it is larger than the sum of its proper divisors (42062530983879).

102100221200121 is a wasteful number, since it uses less digits than its factorization.

102100221200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295325448.

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

Adding to 102100221200121 its reverse (121002122001201), we get a palindrome (223102343201322).

The spelling of 102100221200121 in words is "one hundred two trillion, one hundred billion, two hundred twenty-one million, two hundred thousand, one hundred twenty-one".