121671502699 has 4 divisors (see below), whose sum is σ = 121713417936. Its totient is φ = 121629587464.

The previous prime is 121671502669. The next prime is 121671502703. The reversal of 121671502699 is 996205176121.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121671502699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121671502609) 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, 20953264 + ... + 20959069.

It is an arithmetic number, because the mean of its divisors is an integer number (30428354484).

Almost surely, 2^121671502699 is an apocalyptic number.

121671502699 is a deficient number, since it is larger than the sum of its proper divisors (41915237).

121671502699 is an equidigital number, since it uses as much as digits as its factorization.

121671502699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41915236.

The product of its (nonzero) digits is 408240, while the sum is 49.

The spelling of 121671502699 in words is "one hundred twenty-one billion, six hundred seventy-one million, five hundred two thousand, six hundred ninety-nine".