30221020231 has 4 divisors (see below), whose sum is σ = 30401984592. Its totient is φ = 30040055872.

The previous prime is 30221020229. The next prime is 30221020273. The reversal of 30221020231 is 13202012203.

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

It is a cyclic number.

It is not a de Polignac number, because 30221020231 - 2¹ = 30221020229 is a prime.

It is a super-2 number, since 2×30221020231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30221020331) 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, 90481930 + ... + 90482263.

It is an arithmetic number, because the mean of its divisors is an integer number (7600496148).

Almost surely, 2^30221020231 is an apocalyptic number.

30221020231 is a deficient number, since it is larger than the sum of its proper divisors (180964361).

30221020231 is a wasteful number, since it uses less digits than its factorization.

30221020231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180964360.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 30221020231 its reverse (13202012203), we get a palindrome (43423032434).

The spelling of 30221020231 in words is "thirty billion, two hundred twenty-one million, twenty thousand, two hundred thirty-one".