30021213131 has 48 divisors (see below), whose sum is σ = 39853013760. Its totient is φ = 22352500800.

The previous prime is 30021213127. The next prime is 30021213133. The reversal of 30021213131 is 13131212003.

It is not a de Polignac number, because 30021213131 - 2² = 30021213127 is a prime.

It is a super-2 number, since 2×30021213131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30021213133) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1819340 + ... + 1835766.

It is an arithmetic number, because the mean of its divisors is an integer number (830271120).

Almost surely, 2^30021213131 is an apocalyptic number.

30021213131 is a deficient number, since it is larger than the sum of its proper divisors (9831800629).

30021213131 is a wasteful number, since it uses less digits than its factorization.

30021213131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16624 (or 16617 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 30021213131 its reverse (13131212003), we get a palindrome (43152425134).

The spelling of 30021213131 in words is "thirty billion, twenty-one million, two hundred thirteen thousand, one hundred thirty-one".