11110001010021 has 6 divisors (see below), whose sum is σ = 16047779236710. Its totient is φ = 7406667340008.

The previous prime is 11110001009993. The next prime is 11110001010023. The reversal of 11110001010021 is 12001010001111.

It can be written as a sum of positive squares in only one way, i.e., 8337396377025 + 2772604632996 = 2887455^2 + 1665114^2 .

It is not a de Polignac number, because 11110001010021 - 2²⁵ = 11109967455589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 1234444556669 = 11110001010021 / (1 + 1 + 1 + 1 + 0 + 0 + 0 + 1 + 0 + 1 + 0 + 0 + 2 + 1).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11110001009985 and 11110001010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11110001010023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 617222278326 + ... + 617222278343.

It is an arithmetic number, because the mean of its divisors is an integer number (2674629872785).

Almost surely, 2^{11110001010021} is an apocalyptic number.

It is an amenable number.

11110001010021 is a deficient number, since it is larger than the sum of its proper divisors (4937778226689).

11110001010021 is a wasteful number, since it uses less digits than its factorization.

11110001010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234444556675 (or 1234444556672 counting only the distinct ones).

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

Adding to 11110001010021 its reverse (12001010001111), we get a palindrome (23111011011132).

The spelling of 11110001010021 in words is "eleven trillion, one hundred ten billion, one million, ten thousand, twenty-one".