102002112221221 has 4 divisors (see below), whose sum is σ = 102023581834944. Its totient is φ = 101980642607500.

The previous prime is 102002112221189. The next prime is 102002112221231. The reversal of 102002112221221 is 122122211200201.

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 102002112221221 - 2⁵ = 102002112221189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102002112221231) 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, 10734799735 + ... + 10734809236.

It is an arithmetic number, because the mean of its divisors is an integer number (25505895458736).

Almost surely, 2^{102002112221221} is an apocalyptic number.

It is an amenable number.

102002112221221 is a deficient number, since it is larger than the sum of its proper divisors (21469613723).

102002112221221 is an equidigital number, since it uses as much as digits as its factorization.

102002112221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21469613722.

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

Adding to 102002112221221 its reverse (122122211200201), we get a palindrome (224124323421422).

The spelling of 102002112221221 in words is "one hundred two trillion, two billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twenty-one".