121771690319 has 8 divisors (see below), whose sum is σ = 129680021520. Its totient is φ = 113946169216.

The previous prime is 121771690303. The next prime is 121771690373. The reversal of 121771690319 is 913096177121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121771690319 - 2⁴ = 121771690303 is a prime.

It is a super-2 number, since 2×121771690319² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121771693319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20699489 + ... + 20705370.

It is an arithmetic number, because the mean of its divisors is an integer number (16210002690).

Almost surely, 2^121771690319 is an apocalyptic number.

121771690319 is a deficient number, since it is larger than the sum of its proper divisors (7908331201).

121771690319 is a wasteful number, since it uses less digits than its factorization.

121771690319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41405049.

The product of its (nonzero) digits is 142884, while the sum is 47.

The spelling of 121771690319 in words is "one hundred twenty-one billion, seven hundred seventy-one million, six hundred ninety thousand, three hundred nineteen".