20010131231 has 8 divisors (see below), whose sum is σ = 21637990080. Its totient is φ = 18432360448.

The previous prime is 20010131213. The next prime is 20010131237. The reversal of 20010131231 is 13213101002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20010131231 is a prime.

It is a super-2 number, since 2×20010131231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010131237) 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 7 ways as a sum of consecutive naturals, for example, 12521186 + ... + 12522783.

It is an arithmetic number, because the mean of its divisors is an integer number (2704748760).

Almost surely, 2^20010131231 is an apocalyptic number.

20010131231 is a deficient number, since it is larger than the sum of its proper divisors (1627858849).

20010131231 is a wasteful number, since it uses less digits than its factorization.

20010131231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25044033.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 20010131231 its reverse (13213101002), we get a palindrome (33223232233).

The spelling of 20010131231 in words is "twenty billion, ten million, one hundred thirty-one thousand, two hundred thirty-one".