22121100201221 has 8 divisors (see below), whose sum is σ = 25285801953984. Its totient is φ = 18957534593760.

The previous prime is 22121100201181. The next prime is 22121100201269. The reversal of 22121100201221 is 12210200112122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22121100201221 - 2¹⁰ = 22121100200197 is a prime.

It is a super-2 number, since 2×22121100201221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22121100201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121100201821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283994600 + ... + 284072481.

It is an arithmetic number, because the mean of its divisors is an integer number (3160725244248).

Almost surely, 2^{22121100201221} is an apocalyptic number.

It is an amenable number.

22121100201221 is a deficient number, since it is larger than the sum of its proper divisors (3164701752763).

22121100201221 is an equidigital number, since it uses as much as digits as its factorization.

22121100201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568072651.

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

Adding to 22121100201221 its reverse (12210200112122), we get a palindrome (34331300313343).

The spelling of 22121100201221 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred million, two hundred one thousand, two hundred twenty-one".