1121220020178 has 32 divisors (see below), whose sum is σ = 2638164755520. Its totient is φ = 351755300160.

The previous prime is 1121220020177. The next prime is 1121220020227. The reversal of 1121220020178 is 8710200221211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1121220020177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 610685368 + ... + 610687203.

It is an arithmetic number, because the mean of its divisors is an integer number (82442648610).

Almost surely, 2^{1121220020178} is an apocalyptic number.

1121220020178 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1121220020178 is an abundant number, since it is smaller than the sum of its proper divisors (1516944735342).

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

1121220020178 is a wasteful number, since it uses less digits than its factorization.

1121220020178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221372599 (or 1221372593 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

Adding to 1121220020178 its reverse (8710200221211), we get a palindrome (9831420241389).

The spelling of 1121220020178 in words is "one trillion, one hundred twenty-one billion, two hundred twenty million, twenty thousand, one hundred seventy-eight".