1121402020100 has 72 divisors (see below), whose sum is σ = 2475488954400. Its totient is φ = 440815219200.

The previous prime is 1121402020049. The next prime is 1121402020117. The reversal of 1121402020100 is 10202041211.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19198940 + ... + 19257260.

Almost surely, 2^{1121402020100} is an apocalyptic number.

1121402020100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121402020100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1237744477200).

1121402020100 is an abundant number, since it is smaller than the sum of its proper divisors (1354086934300).

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

1121402020100 is a wasteful number, since it uses less digits than its factorization.

1121402020100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61653 (or 61646 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1121402020100 its reverse (10202041211), we get a palindrome (1131604061311).

The spelling of 1121402020100 in words is "one trillion, one hundred twenty-one billion, four hundred two million, twenty thousand, one hundred".