120131261 has 2 divisors, whose sum is σ = 120131262. Its totient is φ = 120131260.

The previous prime is 120131233. The next prime is 120131273. The reversal of 120131261 is 162131021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118679236 + 1452025 = 10894^2 + 1205^2 .

It is a cyclic number.

It is not a de Polignac number, because 120131261 - 2¹⁰ = 120130237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120131161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60065630 + 60065631.

It is an arithmetic number, because the mean of its divisors is an integer number (60065631).

Almost surely, 2^120131261 is an apocalyptic number.

It is an amenable number.

120131261 is a deficient number, since it is larger than the sum of its proper divisors (1).

120131261 is an equidigital number, since it uses as much as digits as its factorization.

120131261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 120131261 is about 10960.4407301896. The cubic root of 120131261 is about 493.4221923677.

Adding to 120131261 its reverse (162131021), we get a palindrome (282262282).

The spelling of 120131261 in words is "one hundred twenty million, one hundred thirty-one thousand, two hundred sixty-one".