102012120121 has 4 divisors (see below), whose sum is σ = 102052111744. Its totient is φ = 101972128500.

The previous prime is 102012120103. The next prime is 102012120149. The reversal of 102012120121 is 121021210201.

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 102012120121 - 2⁹ = 102012119609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102012120101) 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, 19991985 + ... + 19997086.

It is an arithmetic number, because the mean of its divisors is an integer number (25513027936).

Almost surely, 2^102012120121 is an apocalyptic number.

It is an amenable number.

102012120121 is a deficient number, since it is larger than the sum of its proper divisors (39991623).

102012120121 is an equidigital number, since it uses as much as digits as its factorization.

102012120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39991622.

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

Adding to 102012120121 its reverse (121021210201), we get a palindrome (223033330322).

The spelling of 102012120121 in words is "one hundred two billion, twelve million, one hundred twenty thousand, one hundred twenty-one".