22121303430221 has 2 divisors, whose sum is σ = 22121303430222. Its totient is φ = 22121303430220.

The previous prime is 22121303430209. The next prime is 22121303430263. The reversal of 22121303430221 is 12203430312122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18945562022500 + 3175741407721 = 4352650^2 + 1782061^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121303430221 - 2¹⁴ = 22121303413837 is a prime.

It is a super-2 number, since 2×22121303430221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22121303435221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060651715110 + 11060651715111.

It is an arithmetic number, because the mean of its divisors is an integer number (11060651715111).

Almost surely, 2^{22121303430221} is an apocalyptic number.

It is an amenable number.

22121303430221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121303430221 is an equidigital number, since it uses as much as digits as its factorization.

22121303430221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 22121303430221 its reverse (12203430312122), we get a palindrome (34324733742343).

The spelling of 22121303430221 in words is "twenty-two trillion, one hundred twenty-one billion, three hundred three million, four hundred thirty thousand, two hundred twenty-one".