11011021120021 has 32 divisors (see below), whose sum is σ = 12337218270720. Its totient is φ = 9757448870400.

The previous prime is 11011021119949. The next prime is 11011021120081. The reversal of 11011021120021 is 12002112011011.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11011021120021 - 2¹¹ = 11011021117973 is a prime.

It is a super-2 number, since 2×11011021120021² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 11011021119983 and 11011021120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011021120081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48936586 + ... + 49161076.

It is an arithmetic number, because the mean of its divisors is an integer number (385538070960).

Almost surely, 2^{11011021120021} is an apocalyptic number.

It is an amenable number.

11011021120021 is a deficient number, since it is larger than the sum of its proper divisors (1326197150699).

11011021120021 is a wasteful number, since it uses less digits than its factorization.

11011021120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225277.

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

Adding to 11011021120021 its reverse (12002112011011), we get a palindrome (23013133131032).

The spelling of 11011021120021 in words is "eleven trillion, eleven billion, twenty-one million, one hundred twenty thousand, twenty-one".