30101021221 has 4 divisors (see below), whose sum is σ = 31138987500. Its totient is φ = 29063054944.

The previous prime is 30101021189. The next prime is 30101021227. The reversal of 30101021221 is 12212010103.

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 15453970596 + 14647050625 = 124314^2 + 121025^2 .

It is a cyclic number.

It is not a de Polignac number, because 30101021221 - 2⁵ = 30101021189 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 (30101021227) 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, 518983096 + ... + 518983153.

It is an arithmetic number, because the mean of its divisors is an integer number (7784746875).

Almost surely, 2^30101021221 is an apocalyptic number.

It is an amenable number.

30101021221 is a deficient number, since it is larger than the sum of its proper divisors (1037966279).

30101021221 is a wasteful number, since it uses less digits than its factorization.

30101021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037966278.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 30101021221 its reverse (12212010103), we get a palindrome (42313031324).

The spelling of 30101021221 in words is "thirty billion, one hundred one million, twenty-one thousand, two hundred twenty-one".