120011031231 has 24 divisors (see below), whose sum is σ = 200457989424. Its totient is φ = 63302520960.

The previous prime is 120011031223. The next prime is 120011031253. The reversal of 120011031231 is 132130110021.

It is a happy number.

It is not a de Polignac number, because 120011031231 - 2³ = 120011031223 is a prime.

It is a super-2 number, since 2×120011031231² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 120011031231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120011031281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31398150 + ... + 31401971.

It is an arithmetic number, because the mean of its divisors is an integer number (8352416226).

Almost surely, 2^120011031231 is an apocalyptic number.

120011031231 is a deficient number, since it is larger than the sum of its proper divisors (80446958193).

120011031231 is a wasteful number, since it uses less digits than its factorization.

120011031231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62800151 (or 62800144 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 120011031231 its reverse (132130110021), we get a palindrome (252141141252).

The spelling of 120011031231 in words is "one hundred twenty billion, eleven million, thirty-one thousand, two hundred thirty-one".