30102331221 has 6 divisors (see below), whose sum is σ = 43481145110. Its totient is φ = 20068220808.

The previous prime is 30102331169. The next prime is 30102331243. The reversal of 30102331221 is 12213320103.

It can be written as a sum of positive squares in only one way, i.e., 18052878321 + 12049452900 = 134361^2 + 109770^2 .

It is not a de Polignac number, because 30102331221 - 2²² = 30098136917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30102331194 and 30102331203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30102331271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1672351726 + ... + 1672351743.

Almost surely, 2^30102331221 is an apocalyptic number.

It is an amenable number.

30102331221 is a deficient number, since it is larger than the sum of its proper divisors (13378813889).

30102331221 is a wasteful number, since it uses less digits than its factorization.

30102331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3344703475 (or 3344703472 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 30102331221 its reverse (12213320103), we get a palindrome (42315651324).

The spelling of 30102331221 in words is "thirty billion, one hundred two million, three hundred thirty-one thousand, two hundred twenty-one".