30012131 has 4 divisors (see below), whose sum is σ = 30024600. Its totient is φ = 29999664.

The previous prime is 30012107. The next prime is 30012139. The reversal of 30012131 is 13121003.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30012131 is a prime.

It is a super-2 number, since 2×30012131² = 1801456014322322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30012139) 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, 1346 + ... + 7863.

It is an arithmetic number, because the mean of its divisors is an integer number (7506150).

Almost surely, 2^30012131 is an apocalyptic number.

30012131 is a deficient number, since it is larger than the sum of its proper divisors (12469).

30012131 is an equidigital number, since it uses as much as digits as its factorization.

30012131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12468.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 30012131 is about 5478.3328668492. The cubic root of 30012131 is about 310.7651269931.

Adding to 30012131 its reverse (13121003), we get a palindrome (43133134).

The spelling of 30012131 in words is "thirty million, twelve thousand, one hundred thirty-one".