121036808798929 has 3 divisors (see below), whose sum is σ = 121036819800603. Its totient is φ = 121036797797256.

The previous prime is 121036808798923. The next prime is 121036808798987. The reversal of 121036808798929 is 929897808630121.

The square root of 121036808798929 is 11001673.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 10394853051025 + 110641955747904 = 3224105^2 + 10518648^2 .

It is not a de Polignac number, because 121036808798929 - 2²⁹ = 121036271928017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121036808798923) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5500837 + ... + 16502509.

It is an arithmetic number, because the mean of its divisors is an integer number (40345606600201).

Almost surely, 2^{121036808798929} is an apocalyptic number.

121036808798929 is the 11001673-rd square number.

121036808798929 is the 5500837-th centered octagonal number.

It is an amenable number.

121036808798929 is a deficient number, since it is larger than the sum of its proper divisors (11001674).

121036808798929 is an frugal number, since it uses more digits than its factorization.

121036808798929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22003346 (or 11001673 counting only the distinct ones).

The product of its (nonzero) digits is 188116992, while the sum is 73.

The spelling of 121036808798929 in words is "one hundred twenty-one trillion, thirty-six billion, eight hundred eight million, seven hundred ninety-eight thousand, nine hundred twenty-nine".