102002111112221 has 4 divisors (see below), whose sum is σ = 102003997195392. Its totient is φ = 102000225029052.

The previous prime is 102002111112203. The next prime is 102002111112247. The reversal of 102002111112221 is 122211111200201.

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 102002111112221 - 2³⁴ = 101984931243037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102002111112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102002111112721) 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, 942960461 + ... + 943068626.

It is an arithmetic number, because the mean of its divisors is an integer number (25500999298848).

Almost surely, 2^{102002111112221} is an apocalyptic number.

It is an amenable number.

102002111112221 is a deficient number, since it is larger than the sum of its proper divisors (1886083171).

102002111112221 is an equidigital number, since it uses as much as digits as its factorization.

102002111112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886083170.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 102002111112221 its reverse (122211111200201), we get a palindrome (224213222312422).

The spelling of 102002111112221 in words is "one hundred two trillion, two billion, one hundred eleven million, one hundred twelve thousand, two hundred twenty-one".