121513048378 has 16 divisors (see below), whose sum is σ = 190027433376. Its totient is φ = 58223889360.

The previous prime is 121513048333. The next prime is 121513048403. The reversal of 121513048378 is 873840315121.

121513048378 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×121513048378³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13325088 + ... + 13334203.

It is an arithmetic number, because the mean of its divisors is an integer number (11876714586).

Almost surely, 2^121513048378 is an apocalyptic number.

121513048378 is a deficient number, since it is larger than the sum of its proper divisors (68514384998).

121513048378 is a wasteful number, since it uses less digits than its factorization.

121513048378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26659389.

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 121513048378 in words is "one hundred twenty-one billion, five hundred thirteen million, forty-eight thousand, three hundred seventy-eight".