102120312121 has 4 divisors (see below), whose sum is σ = 103644495952. Its totient is φ = 100596128292.

The previous prime is 102120312101. The next prime is 102120312167. The reversal of 102120312121 is 121213021201.

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 102120312121 - 2⁵ = 102120312089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102120312095 and 102120312104.

It is not an unprimeable number, because it can be changed into a prime (102120312101) 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, 762091815 + ... + 762091948.

It is an arithmetic number, because the mean of its divisors is an integer number (25911123988).

Almost surely, 2^102120312121 is an apocalyptic number.

It is an amenable number.

102120312121 is a deficient number, since it is larger than the sum of its proper divisors (1524183831).

102120312121 is an equidigital number, since it uses as much as digits as its factorization.

102120312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524183830.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 102120312121 its reverse (121213021201), we get a palindrome (223333333322).

The spelling of 102120312121 in words is "one hundred two billion, one hundred twenty million, three hundred twelve thousand, one hundred twenty-one".