1020121119978 has 16 divisors (see below), whose sum is σ = 2147623410720. Its totient is φ = 322143511536.

The previous prime is 1020121119971. The next prime is 1020121119991. The reversal of 1020121119978 is 8799111210201.

It is not an unprimeable number, because it can be changed into a prime (1020121119971) 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, 4474215325 + ... + 4474215552.

It is an arithmetic number, because the mean of its divisors is an integer number (134226463170).

Almost surely, 2^{1020121119978} is an apocalyptic number.

1020121119978 is an abundant number, since it is smaller than the sum of its proper divisors (1127502290742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020121119978 is a wasteful number, since it uses less digits than its factorization.

1020121119978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8948430901.

The product of its (nonzero) digits is 18144, while the sum is 42.

The spelling of 1020121119978 in words is "one trillion, twenty billion, one hundred twenty-one million, one hundred nineteen thousand, nine hundred seventy-eight".