102010210121 has 4 divisors (see below), whose sum is σ = 106445436672. Its totient is φ = 97574983572.

The previous prime is 102010210111. The next prime is 102010210123. The reversal of 102010210121 is 121012010201.

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.

It is a cyclic number.

It is not a de Polignac number, because 102010210121 - 2¹⁰ = 102010209097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102010210123) 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, 2217613241 + ... + 2217613286.

It is an arithmetic number, because the mean of its divisors is an integer number (26611359168).

Almost surely, 2^102010210121 is an apocalyptic number.

It is an amenable number.

102010210121 is a deficient number, since it is larger than the sum of its proper divisors (4435226551).

102010210121 is an equidigital number, since it uses as much as digits as its factorization.

102010210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4435226550.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 102010210121 its reverse (121012010201), we get a palindrome (223022220322).

The spelling of 102010210121 in words is "one hundred two billion, ten million, two hundred ten thousand, one hundred twenty-one".