20121030230131 has 4 divisors (see below), whose sum is σ = 20549137256352. Its totient is φ = 19692923203912.

The previous prime is 20121030230123. The next prime is 20121030230137. The reversal of 20121030230131 is 13103203012102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20121030230131 - 2³ = 20121030230123 is a prime.

It is a super-2 number, since 2×20121030230131² (a number of 27 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 = 20121030230099 and 20121030230108.

It is not an unprimeable number, because it can be changed into a prime (20121030230137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214053513040 + ... + 214053513133.

It is an arithmetic number, because the mean of its divisors is an integer number (5137284314088).

Almost surely, 2^{20121030230131} is an apocalyptic number.

20121030230131 is a deficient number, since it is larger than the sum of its proper divisors (428107026221).

20121030230131 is an equidigital number, since it uses as much as digits as its factorization.

20121030230131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428107026220.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20121030230131 its reverse (13103203012102), we get a palindrome (33224233242233).

The spelling of 20121030230131 in words is "twenty trillion, one hundred twenty-one billion, thirty million, two hundred thirty thousand, one hundred thirty-one".