11100212222021 has 4 divisors (see below), whose sum is σ = 11954074700652. Its totient is φ = 10246349743392.

The previous prime is 11100212222017. The next prime is 11100212222089. The reversal of 11100212222021 is 12022221200111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2387596684225 + 8712615537796 = 1545185^2 + 2951714^2 .

It is a cyclic number.

It is not a de Polignac number, because 11100212222021 - 2² = 11100212222017 is a prime.

It is a super-2 number, since 2×11100212222021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100212222621) 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, 426931239296 + ... + 426931239321.

It is an arithmetic number, because the mean of its divisors is an integer number (2988518675163).

Almost surely, 2^{11100212222021} is an apocalyptic number.

It is an amenable number.

11100212222021 is a deficient number, since it is larger than the sum of its proper divisors (853862478631).

11100212222021 is an equidigital number, since it uses as much as digits as its factorization.

11100212222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853862478630.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11100212222021 its reverse (12022221200111), we get a palindrome (23122433422132).

The spelling of 11100212222021 in words is "eleven trillion, one hundred billion, two hundred twelve million, two hundred twenty-two thousand, twenty-one".