102211210112221 has 4 divisors (see below), whose sum is σ = 116812811556832. Its totient is φ = 87609608667612.

The previous prime is 102211210112191. The next prime is 102211210112261. The reversal of 102211210112221 is 122211012112201.

It is a happy number.

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 102211210112221 - 2⁹ = 102211210111709 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 (102211210112261) 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, 7300800722295 + ... + 7300800722308.

It is an arithmetic number, because the mean of its divisors is an integer number (29203202889208).

Almost surely, 2^{102211210112221} is an apocalyptic number.

It is an amenable number.

102211210112221 is a deficient number, since it is larger than the sum of its proper divisors (14601601444611).

102211210112221 is an equidigital number, since it uses as much as digits as its factorization.

102211210112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14601601444610.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 102211210112221 its reverse (122211012112201), we get a palindrome (224422222224422).

The spelling of 102211210112221 in words is "one hundred two trillion, two hundred eleven billion, two hundred ten million, one hundred twelve thousand, two hundred twenty-one".