1121110021000 has 32 divisors (see below), whose sum is σ = 2623397451480. Its totient is φ = 448444008000.

The previous prime is 1121110020977. The next prime is 1121110021027. The reversal of 1121110021000 is 1200111211.

It can be written as a sum of positive squares in 4 ways, for example, as 577566560484 + 543543460516 = 759978^2 + 737254^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560554011 + ... + 560556010.

Almost surely, 2^{1121110021000} is an apocalyptic number.

1121110021000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121110021000 is an abundant number, since it is smaller than the sum of its proper divisors (1502287430480).

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

1121110021000 is a wasteful number, since it uses less digits than its factorization.

1121110021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121110042 (or 1121110028 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1121110021000 its reverse (1200111211), we get a palindrome (1122310132211).

The spelling of 1121110021000 in words is "one trillion, one hundred twenty-one billion, one hundred ten million, twenty-one thousand".