1121401024400 has 60 divisors (see below), whose sum is σ = 2694457566000. Its totient is φ = 448511859840.

The previous prime is 1121401024277. The next prime is 1121401024481. The reversal of 1121401024400 is 44201041211.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 3668651 + ... + 3962549.

It is an arithmetic number, because the mean of its divisors is an integer number (44907626100).

Almost surely, 2^{1121401024400} is an apocalyptic number.

1121401024400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121401024400 is an abundant number, since it is smaller than the sum of its proper divisors (1573056541600).

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

1121401024400 is a wasteful number, since it uses less digits than its factorization.

1121401024400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303456 (or 303445 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1121401024400 its reverse (44201041211), we get a palindrome (1165602065611).

The spelling of 1121401024400 in words is "one trillion, one hundred twenty-one billion, four hundred one million, twenty-four thousand, four hundred".