30220121231 has 4 divisors (see below), whose sum is σ = 30922914792. Its totient is φ = 29517327672.

The previous prime is 30220121171. The next prime is 30220121233. The reversal of 30220121231 is 13212102203.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13212102203 = 21157 ⋅624479.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30220121231 is a prime.

It is a super-2 number, since 2×30220121231² (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 (30220121233) 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, 351396716 + ... + 351396801.

It is an arithmetic number, because the mean of its divisors is an integer number (7730728698).

Almost surely, 2^30220121231 is an apocalyptic number.

30220121231 is a deficient number, since it is larger than the sum of its proper divisors (702793561).

30220121231 is an equidigital number, since it uses as much as digits as its factorization.

30220121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702793560.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 30220121231 its reverse (13212102203), we get a palindrome (43432223434).

The spelling of 30220121231 in words is "thirty billion, two hundred twenty million, one hundred twenty-one thousand, two hundred thirty-one".