11101010100021 has 16 divisors (see below), whose sum is σ = 16615486675200. Its totient is φ = 7324377796224.

The previous prime is 11101010100007. The next prime is 11101010100043. The reversal of 11101010100021 is 12000101010111.

It is not a de Polignac number, because 11101010100021 - 2²³ = 11101001711413 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 = 11101010099976 and 11101010100012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101017100021) 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, 2119319661 + ... + 2119324898.

It is an arithmetic number, because the mean of its divisors is an integer number (1038467917200).

Almost surely, 2^{11101010100021} is an apocalyptic number.

It is an amenable number.

11101010100021 is a deficient number, since it is larger than the sum of its proper divisors (5514476575179).

11101010100021 is an equidigital number, since it uses as much as digits as its factorization.

11101010100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4238644665 (or 4238644659 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 11101010100021 its reverse (12000101010111), we get a palindrome (23101111110132).

The spelling of 11101010100021 in words is "eleven trillion, one hundred one billion, ten million, one hundred thousand, twenty-one".