1120100021001 has 56 divisors (see below), whose sum is σ = 1808906649480. Its totient is φ = 689162121216.

The previous prime is 1120100020981. The next prime is 1120100021081. The reversal of 1120100021001 is 1001200010211.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 746600976 + 1119353420025 = 27324^2 + 1057995^2 .

It is not a de Polignac number, because 1120100021001 - 2⁵ = 1120100020969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1120100021081) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 81770185 + ... + 81783881.

It is an arithmetic number, because the mean of its divisors is an integer number (32301904455).

Almost surely, 2^{1120100021001} is an apocalyptic number.

It is an amenable number.

1120100021001 is a deficient number, since it is larger than the sum of its proper divisors (688806628479).

1120100021001 is an equidigital number, since it uses as much as digits as its factorization.

1120100021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22357 (or 22342 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1120100021001 its reverse (1001200010211), we get a palindrome (2121300031212).

The spelling of 1120100021001 in words is "one trillion, one hundred twenty billion, one hundred million, twenty-one thousand, one".