121041905969 has 4 divisors (see below), whose sum is σ = 123994147620. Its totient is φ = 118089664320.

The previous prime is 121041905939. The next prime is 121041905977. The reversal of 121041905969 is 969509140121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24991499569 + 96050406400 = 158087^2 + 309920^2 .

It is a cyclic number.

It is not a de Polignac number, because 121041905969 - 2²⁰ = 121040857393 is a prime.

It is a super-2 number, since 2×121041905969² (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 (121041905939) 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, 1476120764 + ... + 1476120845.

It is an arithmetic number, because the mean of its divisors is an integer number (30998536905).

Almost surely, 2^121041905969 is an apocalyptic number.

It is an amenable number.

121041905969 is a deficient number, since it is larger than the sum of its proper divisors (2952241651).

121041905969 is an equidigital number, since it uses as much as digits as its factorization.

121041905969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2952241650.

The product of its (nonzero) digits is 174960, while the sum is 47.

The spelling of 121041905969 in words is "one hundred twenty-one billion, forty-one million, nine hundred five thousand, nine hundred sixty-nine".