102210120121 has 4 divisors (see below), whose sum is σ = 102211290100. Its totient is φ = 102208950144.

The previous prime is 102210120101. The next prime is 102210120151. The reversal of 102210120121 is 121021012201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121021012201 = 7451 ⋅16242251.

It can be written as a sum of positive squares in 2 ways, for example, as 52897700025 + 49312420096 = 229995^2 + 222064^2 .

It is a cyclic number.

It is not a de Polignac number, because 102210120121 - 2¹³ = 102210111929 is a prime.

It is a super-3 number, since 3×102210120121³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102210120101) 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, 442356 + ... + 632533.

It is an arithmetic number, because the mean of its divisors is an integer number (25552822525).

Almost surely, 2^102210120121 is an apocalyptic number.

It is an amenable number.

102210120121 is a deficient number, since it is larger than the sum of its proper divisors (1169979).

102210120121 is an equidigital number, since it uses as much as digits as its factorization.

102210120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169978.

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

Adding to 102210120121 its reverse (121021012201), we get a palindrome (223231132322).

The spelling of 102210120121 in words is "one hundred two billion, two hundred ten million, one hundred twenty thousand, one hundred twenty-one".