30332121221 has 4 divisors (see below), whose sum is σ = 30332899500. Its totient is φ = 30331342944.

The previous prime is 30332121187. The next prime is 30332121223. The reversal of 30332121221 is 12212123303.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14759577121 + 15572544100 = 121489^2 + 124790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30332121221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30332121193 and 30332121202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30332121223) 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, 327416 + ... + 409713.

It is an arithmetic number, because the mean of its divisors is an integer number (7583224875).

Almost surely, 2^30332121221 is an apocalyptic number.

It is an amenable number.

30332121221 is a deficient number, since it is larger than the sum of its proper divisors (778279).

30332121221 is an equidigital number, since it uses as much as digits as its factorization.

30332121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778278.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 30332121221 its reverse (12212123303), we get a palindrome (42544244524).

The spelling of 30332121221 in words is "thirty billion, three hundred thirty-two million, one hundred twenty-one thousand, two hundred twenty-one".