121005113081 has 4 divisors (see below), whose sum is σ = 121465208832. Its totient is φ = 120545017332.

The previous prime is 121005113063. The next prime is 121005113087. The reversal of 121005113081 is 180311500121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 180311500121 = 18803 ⋅9589507.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121005113081 is a prime.

It is a super-2 number, since 2×121005113081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121005113087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230047481 + ... + 230048006.

It is an arithmetic number, because the mean of its divisors is an integer number (30366302208).

Almost surely, 2^121005113081 is an apocalyptic number.

It is an amenable number.

121005113081 is a deficient number, since it is larger than the sum of its proper divisors (460095751).

121005113081 is an equidigital number, since it uses as much as digits as its factorization.

121005113081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460095750.

The product of its (nonzero) digits is 240, while the sum is 23.

The spelling of 121005113081 in words is "one hundred twenty-one billion, five million, one hundred thirteen thousand, eighty-one".