1110002001021 has 16 divisors (see below), whose sum is σ = 1647053531520. Its totient is φ = 738828578880.

The previous prime is 1110002001011. The next prime is 1110002001061. The reversal of 1110002001021 is 1201002000111.

It is a happy number.

It is not a de Polignac number, because 1110002001021 - 2⁶ = 1110002000957 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 1110002000994 and 1110002001012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1110002001011) 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, 32559180 + ... + 32593253.

It is an arithmetic number, because the mean of its divisors is an integer number (102940845720).

Almost surely, 2^{1110002001021} is an apocalyptic number.

It is an amenable number.

1110002001021 is a deficient number, since it is larger than the sum of its proper divisors (537051530499).

1110002001021 is an equidigital number, since it uses as much as digits as its factorization.

1110002001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65153073 (or 65153067 counting only the distinct ones).

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

Adding to 1110002001021 its reverse (1201002000111), we get a palindrome (2311004001132).

The spelling of 1110002001021 in words is "one trillion, one hundred ten billion, two million, one thousand, twenty-one".