102021222012121 has 4 divisors (see below), whose sum is σ = 102800009966544. Its totient is φ = 101242434057700.

The previous prime is 102021222012113. The next prime is 102021222012163. The reversal of 102021222012121 is 121210222120201.

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 102021222012121 - 2³ = 102021222012113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102021222012181) 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, 389393977015 + ... + 389393977276.

It is an arithmetic number, because the mean of its divisors is an integer number (25700002491636).

Almost surely, 2^{102021222012121} is an apocalyptic number.

It is an amenable number.

102021222012121 is a deficient number, since it is larger than the sum of its proper divisors (778787954423).

102021222012121 is an equidigital number, since it uses as much as digits as its factorization.

102021222012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778787954422.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 102021222012121 its reverse (121210222120201), we get a palindrome (223231444132322).

The spelling of 102021222012121 in words is "one hundred two trillion, twenty-one billion, two hundred twenty-two million, twelve thousand, one hundred twenty-one".