121720696814 has 32 divisors (see below), whose sum is σ = 186717645504. Its totient is φ = 59500108800.

The previous prime is 121720696787. The next prime is 121720696819. The reversal of 121720696814 is 418696027121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121720696819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7336232 + ... + 7352804.

It is an arithmetic number, because the mean of its divisors is an integer number (5834926422).

Almost surely, 2^121720696814 is an apocalyptic number.

121720696814 is a deficient number, since it is larger than the sum of its proper divisors (64996948690).

121720696814 is a wasteful number, since it uses less digits than its factorization.

121720696814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17132.

The product of its (nonzero) digits is 290304, while the sum is 47.

The spelling of 121720696814 in words is "one hundred twenty-one billion, seven hundred twenty million, six hundred ninety-six thousand, eight hundred fourteen".