120920231 has 2 divisors, whose sum is σ = 120920232. Its totient is φ = 120920230.

The previous prime is 120920213. The next prime is 120920251. The reversal of 120920231 is 132029021.

Together with previous prime (120920213) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (120920251) can be obtained adding 120920231 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120920231 is a prime.

It is a super-2 number, since 2×120920231² = 29243404530186722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120920251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60460115 + 60460116.

It is an arithmetic number, because the mean of its divisors is an integer number (60460116).

Almost surely, 2^120920231 is an apocalyptic number.

120920231 is a deficient number, since it is larger than the sum of its proper divisors (1).

120920231 is an equidigital number, since it uses as much as digits as its factorization.

120920231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 120920231 is about 10996.3735385808. The cubic root of 120920231 is about 494.5000305007.

Adding to 120920231 its reverse (132029021), we get a palindrome (252949252).

The spelling of 120920231 in words is "one hundred twenty million, nine hundred twenty thousand, two hundred thirty-one".