102120222021 has 4 divisors (see below), whose sum is σ = 136160296032. Its totient is φ = 68080148012.

The previous prime is 102120221993. The next prime is 102120222047. The reversal of 102120222021 is 120222021201.

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 102120222021 - 2¹¹ = 102120219973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102120222091) 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, 17020037001 + ... + 17020037006.

It is an arithmetic number, because the mean of its divisors is an integer number (34040074008).

Almost surely, 2^102120222021 is an apocalyptic number.

It is an amenable number.

102120222021 is a deficient number, since it is larger than the sum of its proper divisors (34040074011).

102120222021 is an equidigital number, since it uses as much as digits as its factorization.

102120222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34040074010.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 102120222021 its reverse (120222021201), we get a palindrome (222342243222).

The spelling of 102120222021 in words is "one hundred two billion, one hundred twenty million, two hundred twenty-two thousand, twenty-one".