11212100222021 has 4 divisors (see below), whose sum is σ = 11214724167372. Its totient is φ = 11209476276672.

The previous prime is 11212100221999. The next prime is 11212100222069. The reversal of 11212100222021 is 12022200121211.

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 1179113656900 + 10032986565121 = 1085870^2 + 3167489^2 .

It is a cyclic number.

It is not a de Polignac number, because 11212100222021 - 2¹⁴ = 11212100205637 is a prime.

It is a super-2 number, since 2×11212100222021² (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 (11212100222221) 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, 1311966266 + ... + 1311974811.

It is an arithmetic number, because the mean of its divisors is an integer number (2803681041843).

Almost surely, 2^{11212100222021} is an apocalyptic number.

It is an amenable number.

11212100222021 is a deficient number, since it is larger than the sum of its proper divisors (2623945351).

11212100222021 is an equidigital number, since it uses as much as digits as its factorization.

11212100222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2623945350.

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

Adding to 11212100222021 its reverse (12022200121211), we get a palindrome (23234300343232).

The spelling of 11212100222021 in words is "eleven trillion, two hundred twelve billion, one hundred million, two hundred twenty-two thousand, twenty-one".