102210211012121 has 4 divisors (see below), whose sum is σ = 102211134022500. Its totient is φ = 102209288001744.

The previous prime is 102210211012093. The next prime is 102210211012163. The reversal of 102210211012121 is 121210112012201.

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 72373489722121 + 29836721290000 = 8507261^2 + 5462300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102210211012121 is a prime.

It is a Duffinian number.

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 102210211012121.

It is not an unprimeable number, because it can be changed into a prime (102210211512121) 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, 461339066 + ... + 461560563.

It is an arithmetic number, because the mean of its divisors is an integer number (25552783505625).

Almost surely, 2^{102210211012121} is an apocalyptic number.

It is an amenable number.

102210211012121 is a deficient number, since it is larger than the sum of its proper divisors (923010379).

102210211012121 is an equidigital number, since it uses as much as digits as its factorization.

102210211012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923010378.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 102210211012121 its reverse (121210112012201), we get a palindrome (223420323024322).

The spelling of 102210211012121 in words is "one hundred two trillion, two hundred ten billion, two hundred eleven million, twelve thousand, one hundred twenty-one".