30220120031 has 4 divisors (see below), whose sum is σ = 30634094352. Its totient is φ = 29806145712.

The previous prime is 30220119971. The next prime is 30220120061. The reversal of 30220120031 is 13002102203.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13002102203 = 199 ⋅65337197.

It is a cyclic number.

It is not a de Polignac number, because 30220120031 - 2¹⁸ = 30219857887 is a prime.

It is a super-2 number, since 2×30220120031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30220119988 and 30220120015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30220120061) 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, 206987051 + ... + 206987196.

It is an arithmetic number, because the mean of its divisors is an integer number (7658523588).

Almost surely, 2^30220120031 is an apocalyptic number.

30220120031 is a deficient number, since it is larger than the sum of its proper divisors (413974321).

30220120031 is an equidigital number, since it uses as much as digits as its factorization.

30220120031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413974320.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 30220120031 its reverse (13002102203), we get a palindrome (43222222234).

The spelling of 30220120031 in words is "thirty billion, two hundred twenty million, one hundred twenty thousand, thirty-one".