121978370785 has 8 divisors (see below), whose sum is σ = 146435483520. Its totient is φ = 97541737584.

The previous prime is 121978370783. The next prime is 121978370791. The reversal of 121978370785 is 587073879121.

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 121978370785 - 2¹ = 121978370783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121978370783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5106775 + ... + 5130604.

It is an arithmetic number, because the mean of its divisors is an integer number (18304435440).

Almost surely, 2^121978370785 is an apocalyptic number.

It is an amenable number.

121978370785 is a deficient number, since it is larger than the sum of its proper divisors (24457112735).

121978370785 is a wasteful number, since it uses less digits than its factorization.

121978370785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10239767.

The product of its (nonzero) digits is 5927040, while the sum is 58.

The spelling of 121978370785 in words is "one hundred twenty-one billion, nine hundred seventy-eight million, three hundred seventy thousand, seven hundred eighty-five".