20120120231 has 4 divisors (see below), whose sum is σ = 20304708600. Its totient is φ = 19935531864.

The previous prime is 20120120197. The next prime is 20120120299. The reversal of 20120120231 is 13202102102.

It is a happy number.

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 20120120231 - 2³⁴ = 2940251047 is a prime.

It is a super-2 number, since 2×20120120231² (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 (20120129231) 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, 92294021 + ... + 92294238.

It is an arithmetic number, because the mean of its divisors is an integer number (5076177150).

Almost surely, 2^20120120231 is an apocalyptic number.

20120120231 is a deficient number, since it is larger than the sum of its proper divisors (184588369).

20120120231 is a wasteful number, since it uses less digits than its factorization.

20120120231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184588368.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20120120231 its reverse (13202102102), we get a palindrome (33322222333).

The spelling of 20120120231 in words is "twenty billion, one hundred twenty million, one hundred twenty thousand, two hundred thirty-one".