120641681 has 2 divisors, whose sum is σ = 120641682. Its totient is φ = 120641680.

The previous prime is 120641671. The next prime is 120641687. The reversal of 120641681 is 186146021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79566400 + 41075281 = 8920^2 + 6409^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120641681 is a prime.

It is a super-2 number, since 2×120641681² = 29108830389011522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (120641687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60320840 + 60320841.

It is an arithmetic number, because the mean of its divisors is an integer number (60320841).

Almost surely, 2^120641681 is an apocalyptic number.

It is an amenable number.

120641681 is a deficient number, since it is larger than the sum of its proper divisors (1).

120641681 is an equidigital number, since it uses as much as digits as its factorization.

120641681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 120641681 is about 10983.7006969418. The cubic root of 120641681 is about 494.1200309878.

The spelling of 120641681 in words is "one hundred twenty million, six hundred forty-one thousand, six hundred eighty-one".