30022001221 has 4 divisors (see below), whose sum is σ = 30037997772. Its totient is φ = 30006004672.

The previous prime is 30022001197. The next prime is 30022001227. The reversal of 30022001221 is 12210022003.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12210022003 = 19 ⋅642632737.

It can be written as a sum of positive squares in 2 ways, for example, as 18978093121 + 11043908100 = 137761^2 + 105090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30022001221 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 (30022001227) 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, 7995460 + ... + 7999213.

It is an arithmetic number, because the mean of its divisors is an integer number (7509499443).

Almost surely, 2^30022001221 is an apocalyptic number.

It is an amenable number.

30022001221 is a deficient number, since it is larger than the sum of its proper divisors (15996551).

30022001221 is a wasteful number, since it uses less digits than its factorization.

30022001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15996550.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 30022001221 its reverse (12210022003), we get a palindrome (42232023224).

The spelling of 30022001221 in words is "thirty billion, twenty-two million, one thousand, two hundred twenty-one".