22112000201221 has 6 divisors (see below), whose sum is σ = 25722122683110. Its totient is φ = 18953143029576.

The previous prime is 22112000201209. The next prime is 22112000201267. The reversal of 22112000201221 is 12210200021122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21821464109025 + 290536092196 = 4671345^2 + 539014^2 .

It is a de Polignac number, because none of the positive numbers 2^k-22112000201221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22112000201195 and 22112000201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112000205221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 225632655066 + ... + 225632655163.

It is an arithmetic number, because the mean of its divisors is an integer number (4287020447185).

Almost surely, 2^{22112000201221} is an apocalyptic number.

It is an amenable number.

22112000201221 is a deficient number, since it is larger than the sum of its proper divisors (3610122481889).

22112000201221 is an equidigital number, since it uses as much as digits as its factorization.

22112000201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451265310243 (or 451265310236 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22112000201221 its reverse (12210200021122), we get a palindrome (34322200222343).

The spelling of 22112000201221 in words is "twenty-two trillion, one hundred twelve billion, two hundred one thousand, two hundred twenty-one".