120640691486281 has 2 divisors, whose sum is σ = 120640691486282. Its totient is φ = 120640691486280.

The previous prime is 120640691486279. The next prime is 120640691486303. The reversal of 120640691486281 is 182684196046021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95372978596281 + 25267712890000 = 9765909^2 + 5026700^2 .

It is a cyclic number.

It is not a de Polignac number, because 120640691486281 - 2¹ = 120640691486279 is a prime.

It is a super-2 number, since 2×120640691486281² (a number of 29 digits) contains 22 as substring.

Together with 120640691486279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (120640691486221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60320345743140 + 60320345743141.

It is an arithmetic number, because the mean of its divisors is an integer number (60320345743141).

Almost surely, 2^{120640691486281} is an apocalyptic number.

It is an amenable number.

120640691486281 is a deficient number, since it is larger than the sum of its proper divisors (1).

120640691486281 is an equidigital number, since it uses as much as digits as its factorization.

120640691486281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7962624, while the sum is 58.

The spelling of 120640691486281 in words is "one hundred twenty trillion, six hundred forty billion, six hundred ninety-one million, four hundred eighty-six thousand, two hundred eighty-one".