121005061081 has 2 divisors, whose sum is σ = 121005061082. Its totient is φ = 121005061080.

The previous prime is 121005061063. The next prime is 121005061097. The reversal of 121005061081 is 180160500121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68950357056 + 52054704025 = 262584^2 + 228155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121005061081 is a prime.

It is a super-2 number, since 2×121005061081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121005061781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60502530540 + 60502530541.

It is an arithmetic number, because the mean of its divisors is an integer number (60502530541).

Almost surely, 2^121005061081 is an apocalyptic number.

It is an amenable number.

121005061081 is a deficient number, since it is larger than the sum of its proper divisors (1).

121005061081 is an equidigital number, since it uses as much as digits as its factorization.

121005061081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 25.

The spelling of 121005061081 in words is "one hundred twenty-one billion, five million, sixty-one thousand, eighty-one".