1121410865978 has 8 divisors (see below), whose sum is σ = 1811509860468. Its totient is φ = 517574245824.

The previous prime is 1121410865977. The next prime is 1121410866001. The reversal of 1121410865978 is 8795680141211.

It can be written as a sum of positive squares in 2 ways, for example, as 1082292750889 + 39118115089 = 1040333^2 + 197783^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1121410865977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21565593551 + ... + 21565593602.

Almost surely, 2^{1121410865978} is an apocalyptic number.

1121410865978 is a deficient number, since it is larger than the sum of its proper divisors (690098994490).

1121410865978 is a wasteful number, since it uses less digits than its factorization.

1121410865978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43131187168.

The product of its (nonzero) digits is 967680, while the sum is 53.

The spelling of 1121410865978 in words is "one trillion, one hundred twenty-one billion, four hundred ten million, eight hundred sixty-five thousand, nine hundred seventy-eight".