102212221021 has 4 divisors (see below), whose sum is σ = 102216982752. Its totient is φ = 102207459292.

The previous prime is 102212220973. The next prime is 102212221049. The reversal of 102212221021 is 120122212201.

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 102212221021 - 2⁷ = 102212220893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102212220986 and 102212221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102212221061) 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, 2348521 + ... + 2391646.

It is an arithmetic number, because the mean of its divisors is an integer number (25554245688).

Almost surely, 2^102212221021 is an apocalyptic number.

It is an amenable number.

102212221021 is a deficient number, since it is larger than the sum of its proper divisors (4761731).

102212221021 is an equidigital number, since it uses as much as digits as its factorization.

102212221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4761730.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 102212221021 its reverse (120122212201), we get a palindrome (222334433222).

The spelling of 102212221021 in words is "one hundred two billion, two hundred twelve million, two hundred twenty-one thousand, twenty-one".