102001022121 has 4 divisors (see below), whose sum is σ = 136001362832. Its totient is φ = 68000681412.

The previous prime is 102001022107. The next prime is 102001022147. The reversal of 102001022121 is 121220100201.

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: 121220100201 = 3 ⋅40406700067.

It is not a de Polignac number, because 102001022121 - 2⁵ = 102001022089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102001022097 and 102001022106.

It is not an unprimeable number, because it can be changed into a prime (102001022191) 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, 17000170351 + ... + 17000170356.

It is an arithmetic number, because the mean of its divisors is an integer number (34000340708).

Almost surely, 2^102001022121 is an apocalyptic number.

It is an amenable number.

102001022121 is a deficient number, since it is larger than the sum of its proper divisors (34000340711).

102001022121 is an equidigital number, since it uses as much as digits as its factorization.

102001022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34000340710.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 102001022121 its reverse (121220100201), we get a palindrome (223221122322).

The spelling of 102001022121 in words is "one hundred two billion, one million, twenty-two thousand, one hundred twenty-one".