102220211100121 has 4 divisors (see below), whose sum is σ = 103232292398244. Its totient is φ = 101208129802000.

The previous prime is 102220211100103. The next prime is 102220211100169. The reversal of 102220211100121 is 121001112022201.

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 61522688449600 + 40697522650521 = 7843640^2 + 6379461^2 .

It is a cyclic number.

It is not a de Polignac number, because 102220211100121 - 2¹¹ = 102220211098073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102220211100095 and 102220211100104.

It is not an unprimeable number, because it can be changed into a prime (102220211103121) 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, 506040648910 + ... + 506040649111.

It is an arithmetic number, because the mean of its divisors is an integer number (25808073099561).

Almost surely, 2^{102220211100121} is an apocalyptic number.

It is an amenable number.

102220211100121 is a deficient number, since it is larger than the sum of its proper divisors (1012081298123).

102220211100121 is a wasteful number, since it uses less digits than its factorization.

102220211100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012081298122.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 102220211100121 its reverse (121001112022201), we get a palindrome (223221323122322).

The spelling of 102220211100121 in words is "one hundred two trillion, two hundred twenty billion, two hundred eleven million, one hundred thousand, one hundred twenty-one".