11011122001021 has 4 divisors (see below), whose sum is σ = 11489866435872. Its totient is φ = 10532377566172.

The previous prime is 11011122001013. The next prime is 11011122001027. The reversal of 11011122001021 is 12010022111011.

It is a happy number.

11011122001021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11011122001021 - 2³ = 11011122001013 is a prime.

It is a super-2 number, since 2×11011122001021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11011122000992 and 11011122001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011122001027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239372217391 + ... + 239372217436.

It is an arithmetic number, because the mean of its divisors is an integer number (2872466608968).

Almost surely, 2^{11011122001021} is an apocalyptic number.

It is an amenable number.

11011122001021 is a deficient number, since it is larger than the sum of its proper divisors (478744434851).

11011122001021 is an equidigital number, since it uses as much as digits as its factorization.

11011122001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478744434850.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11011122001021 its reverse (12010022111011), we get a palindrome (23021144112032).

The spelling of 11011122001021 in words is "eleven trillion, eleven billion, one hundred twenty-two million, one thousand, twenty-one".