30231001021 has 16 divisors (see below), whose sum is σ = 33116661760. Its totient is φ = 27428544000.

The previous prime is 30231001013. The next prime is 30231001051. The reversal of 30231001021 is 12010013203.

It is not a de Polignac number, because 30231001021 - 2³ = 30231001013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 30231000992 and 30231001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30231001051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163021 + ... + 295021.

It is an arithmetic number, because the mean of its divisors is an integer number (2069791360).

Almost surely, 2^30231001021 is an apocalyptic number.

It is an amenable number.

30231001021 is a deficient number, since it is larger than the sum of its proper divisors (2885660739).

30231001021 is a wasteful number, since it uses less digits than its factorization.

30231001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132316.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 30231001021 its reverse (12010013203), we get a palindrome (42241014224).

It can be divided in two parts, 3023100 and 1021, that added together give a square (3024121 = 1739²).

The spelling of 30231001021 in words is "thirty billion, two hundred thirty-one million, one thousand, twenty-one".