102221210121 has 16 divisors (see below), whose sum is σ = 141109083648. Its totient is φ = 65753452800.

The previous prime is 102221210107. The next prime is 102221210141. The reversal of 102221210121 is 121012122201.

It is not a de Polignac number, because 102221210121 - 2¹⁸ = 102220947977 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 102221210121.

It is not an unprimeable number, because it can be changed into a prime (102221210141) 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, 1599450 + ... + 1662131.

It is an arithmetic number, because the mean of its divisors is an integer number (8819317728).

Almost surely, 2^102221210121 is an apocalyptic number.

It is an amenable number.

102221210121 is a deficient number, since it is larger than the sum of its proper divisors (38887873527).

102221210121 is a wasteful number, since it uses less digits than its factorization.

102221210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3261952.

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

Adding to 102221210121 its reverse (121012122201), we get a palindrome (223233332322).

The spelling of 102221210121 in words is "one hundred two billion, two hundred twenty-one million, two hundred ten thousand, one hundred twenty-one".