102012102220121 has 4 divisors (see below), whose sum is σ = 102059483598132. Its totient is φ = 101964720842112.

The previous prime is 102012102220103. The next prime is 102012102220177. The reversal of 102012102220121 is 121022201210201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53334466272025 + 48677635948096 = 7303045^2 + 6976936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102012102220121 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 102012102220121.

It is not an unprimeable number, because it can be changed into a prime (102012102220921) 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, 23690685776 + ... + 23690690081.

It is an arithmetic number, because the mean of its divisors is an integer number (25514870899533).

Almost surely, 2^{102012102220121} is an apocalyptic number.

It is an amenable number.

102012102220121 is a deficient number, since it is larger than the sum of its proper divisors (47381378011).

102012102220121 is an equidigital number, since it uses as much as digits as its factorization.

102012102220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47381378010.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 102012102220121 its reverse (121022201210201), we get a palindrome (223034303430322).

The spelling of 102012102220121 in words is "one hundred two trillion, twelve billion, one hundred two million, two hundred twenty thousand, one hundred twenty-one".