121729803802 has 4 divisors (see below), whose sum is σ = 182594705706. Its totient is φ = 60864901900.

The previous prime is 121729803799. The next prime is 121729803817. The reversal of 121729803802 is 208308927121.

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

It can be written as a sum of positive squares in only one way, i.e., 116677579561 + 5052224241 = 341581^2 + 71079^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30432450949 + ... + 30432450952.

Almost surely, 2^121729803802 is an apocalyptic number.

121729803802 is a deficient number, since it is larger than the sum of its proper divisors (60864901904).

121729803802 is an equidigital number, since it uses as much as digits as its factorization.

121729803802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60864901903.

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 121729803802 in words is "one hundred twenty-one billion, seven hundred twenty-nine million, eight hundred three thousand, eight hundred two".