11222001122021 has 4 divisors (see below), whose sum is σ = 11293478836332. Its totient is φ = 11150523407712.

The previous prime is 11222001121979. The next prime is 11222001122023. The reversal of 11222001122021 is 12022110022211.

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 4316463312100 + 6905537809921 = 2077610^2 + 2627839^2 .

It is a cyclic number.

It is not a de Polignac number, because 11222001122021 - 2¹⁰ = 11222001120997 is a prime.

It is a super-2 number, since 2×11222001122021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222001122023) 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, 35738856920 + ... + 35738857233.

It is an arithmetic number, because the mean of its divisors is an integer number (2823369709083).

Almost surely, 2^{11222001122021} is an apocalyptic number.

It is an amenable number.

11222001122021 is a deficient number, since it is larger than the sum of its proper divisors (71477714311).

11222001122021 is an equidigital number, since it uses as much as digits as its factorization.

11222001122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71477714310.

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

Adding to 11222001122021 its reverse (12022110022211), we get a palindrome (23244111144232).

The spelling of 11222001122021 in words is "eleven trillion, two hundred twenty-two billion, one million, one hundred twenty-two thousand, twenty-one".