30221222020021 has 4 divisors (see below), whose sum is σ = 30279006383872. Its totient is φ = 30163437656172.

The previous prime is 30221222020013. The next prime is 30221222020051. The reversal of 30221222020021 is 12002022212203.

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 30221222020021 - 2³ = 30221222020013 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 (30221222020051) 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, 28892181141 + ... + 28892182186.

It is an arithmetic number, because the mean of its divisors is an integer number (7569751595968).

Almost surely, 2^{30221222020021} is an apocalyptic number.

It is an amenable number.

30221222020021 is a deficient number, since it is larger than the sum of its proper divisors (57784363851).

30221222020021 is an equidigital number, since it uses as much as digits as its factorization.

30221222020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57784363850.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 30221222020021 its reverse (12002022212203), we get a palindrome (42223244232224).

The spelling of 30221222020021 in words is "thirty trillion, two hundred twenty-one billion, two hundred twenty-two million, twenty thousand, twenty-one".