30231021123 has 20 divisors (see below), whose sum is σ = 45175283208. Its totient is φ = 20147158080.

The previous prime is 30231021109. The next prime is 30231021127. The reversal of 30231021123 is 32112013203.

It is not a de Polignac number, because 30231021123 - 2⁸ = 30231020867 is a prime.

It is a super-2 number, since 2×30231021123² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30231021096 and 30231021105.

It is not an unprimeable number, because it can be changed into a prime (30231021127) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 181915 + ... + 305867.

Almost surely, 2^30231021123 is an apocalyptic number.

30231021123 is a deficient number, since it is larger than the sum of its proper divisors (14944262085).

30231021123 is a wasteful number, since it uses less digits than its factorization.

30231021123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126976 (or 126967 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 30231021123 its reverse (32112013203), we get a palindrome (62343034326).

The spelling of 30231021123 in words is "thirty billion, two hundred thirty-one million, twenty-one thousand, one hundred twenty-three".