1121122119978 has 24 divisors (see below), whose sum is σ = 2776111916448. Its totient is φ = 320320605672.

The previous prime is 1121122119959. The next prime is 1121122120067. The reversal of 1121122119978 is 8799112211211.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4448897176 + ... + 4448897427.

It is an arithmetic number, because the mean of its divisors is an integer number (115671329852).

Almost surely, 2^{1121122119978} is an apocalyptic number.

1121122119978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1121122119978 is an abundant number, since it is smaller than the sum of its proper divisors (1654989796470).

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

1121122119978 is a wasteful number, since it uses less digits than its factorization.

1121122119978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8897794618 (or 8897794615 counting only the distinct ones).

The product of its digits is 36288, while the sum is 45.

It can be divided in two parts, 1121122 and 119978, that added together give a triangular number (1241100 = T₁₅₇₅).

The spelling of 1121122119978 in words is "one trillion, one hundred twenty-one billion, one hundred twenty-two million, one hundred nineteen thousand, nine hundred seventy-eight".