761201021081 has 2 divisors, whose sum is σ = 761201021082. Its totient is φ = 761201021080.

The previous prime is 761201021051. The next prime is 761201021123. The reversal of 761201021081 is 180120102167.

761201021081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 713714073856 + 47486947225 = 844816^2 + 217915^2 .

It is a cyclic number.

It is not a de Polignac number, because 761201021081 - 2¹⁸ = 761200758937 is a prime.

It is a super-2 number, since 2×761201021081² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (761201021051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 380600510540 + 380600510541.

It is an arithmetic number, because the mean of its divisors is an integer number (380600510541).

Almost surely, 2^761201021081 is an apocalyptic number.

It is an amenable number.

761201021081 is a deficient number, since it is larger than the sum of its proper divisors (1).

761201021081 is an equidigital number, since it uses as much as digits as its factorization.

761201021081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 29.

The spelling of 761201021081 in words is "seven hundred sixty-one billion, two hundred one million, twenty-one thousand, eighty-one".