121894972774 has 16 divisors (see below), whose sum is σ = 183110176512. Its totient is φ = 60858285768.

The previous prime is 121894972769. The next prime is 121894972783. The reversal of 121894972774 is 477279498121.

It is a congruent number.

It is an unprimeable number.

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, 9743007 + ... + 9755509.

It is an arithmetic number, because the mean of its divisors is an integer number (11444386032).

Almost surely, 2^121894972774 is an apocalyptic number.

121894972774 is a deficient number, since it is larger than the sum of its proper divisors (61215203738).

121894972774 is a wasteful number, since it uses less digits than its factorization.

121894972774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19251.

The product of its digits is 14224896, while the sum is 61.

The spelling of 121894972774 in words is "one hundred twenty-one billion, eight hundred ninety-four million, nine hundred seventy-two thousand, seven hundred seventy-four".