1102002100021 has 4 divisors (see below), whose sum is σ = 1102072454752. Its totient is φ = 1101931745292.

The previous prime is 1102002099859. The next prime is 1102002100061. The reversal of 1102002100021 is 1200012002011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1102002100021 - 2¹⁵ = 1102002067253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1102002099980 and 1102002100007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102002100061) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 35153865 + ... + 35185198.

It is an arithmetic number, because the mean of its divisors is an integer number (275518113688).

Almost surely, 2^{1102002100021} is an apocalyptic number.

It is an amenable number.

1102002100021 is a deficient number, since it is larger than the sum of its proper divisors (70354731).

1102002100021 is an equidigital number, since it uses as much as digits as its factorization.

1102002100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70354730.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1102002100021 its reverse (1200012002011), we get a palindrome (2302014102032).

The spelling of 1102002100021 in words is "one trillion, one hundred two billion, two million, one hundred thousand, twenty-one".