120111231 has 4 divisors (see below), whose sum is σ = 160148312. Its totient is φ = 80074152.

The previous prime is 120111223. The next prime is 120111247. The reversal of 120111231 is 132111021.

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

It is not a de Polignac number, because 120111231 - 2³ = 120111223 is a prime.

It is a super-2 number, since 2×120111231² = 28853415624670722, which 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 (120111631) 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, 20018536 + ... + 20018541.

It is an arithmetic number, because the mean of its divisors is an integer number (40037078).

Almost surely, 2^120111231 is an apocalyptic number.

120111231 is a deficient number, since it is larger than the sum of its proper divisors (40037081).

120111231 is an equidigital number, since it uses as much as digits as its factorization.

120111231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40037080.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 120111231 is about 10959.5269514701. The cubic root of 120111231 is about 493.3947673778.

Adding to 120111231 its reverse (132111021), we get a palindrome (252222252).

It can be divided in two parts, 1201 and 11231, that multiplied together give a palindrome (13488431).

The spelling of 120111231 in words is "one hundred twenty million, one hundred eleven thousand, two hundred thirty-one".