102012012221 has 4 divisors (see below), whose sum is σ = 116585156832. Its totient is φ = 87438867612.

The previous prime is 102012012199. The next prime is 102012012227. The reversal of 102012012221 is 122210210201.

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 102012012221 - 2¹⁴ = 102011995837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102012012196 and 102012012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102012012227) 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, 7286572295 + ... + 7286572308.

It is an arithmetic number, because the mean of its divisors is an integer number (29146289208).

Almost surely, 2^102012012221 is an apocalyptic number.

It is an amenable number.

102012012221 is a deficient number, since it is larger than the sum of its proper divisors (14573144611).

102012012221 is an equidigital number, since it uses as much as digits as its factorization.

102012012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14573144610.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 102012012221 its reverse (122210210201), we get a palindrome (224222222422).

The spelling of 102012012221 in words is "one hundred two billion, twelve million, twelve thousand, two hundred twenty-one".