102210210121 has 4 divisors (see below), whose sum is σ = 102258630144. Its totient is φ = 102161790100.

The previous prime is 102210210119. The next prime is 102210210149. The reversal of 102210210121 is 121012012201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121012012201 = 6151 ⋅19673551.

It is a cyclic number.

It is not a de Polignac number, because 102210210121 - 2¹ = 102210210119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102210213121) 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, 24206845 + ... + 24211066.

It is an arithmetic number, because the mean of its divisors is an integer number (25564657536).

Almost surely, 2^102210210121 is an apocalyptic number.

It is an amenable number.

102210210121 is a deficient number, since it is larger than the sum of its proper divisors (48420023).

102210210121 is an equidigital number, since it uses as much as digits as its factorization.

102210210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48420022.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102210210121 its reverse (121012012201), we get a palindrome (223222222322).

The spelling of 102210210121 in words is "one hundred two billion, two hundred ten million, two hundred ten thousand, one hundred twenty-one".