22215354405121 has 2 divisors, whose sum is σ = 22215354405122. Its totient is φ = 22215354405120.

The previous prime is 22215354405109. The next prime is 22215354405217. The reversal of 22215354405121 is 12150445351222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22203311537521 + 12042867600 = 4712039^2 + 109740^2 .

It is a cyclic number.

It is not a de Polignac number, because 22215354405121 - 2³⁹ = 21665598591233 is a prime.

It is not a weakly prime, because it can be changed into another prime (22215354405221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11107677202560 + 11107677202561.

It is an arithmetic number, because the mean of its divisors is an integer number (11107677202561).

Almost surely, 2^{22215354405121} is an apocalyptic number.

It is an amenable number.

22215354405121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22215354405121 is an equidigital number, since it uses as much as digits as its factorization.

22215354405121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96000, while the sum is 37.

Adding to 22215354405121 its reverse (12150445351222), we get a palindrome (34365799756343).

The spelling of 22215354405121 in words is "twenty-two trillion, two hundred fifteen billion, three hundred fifty-four million, four hundred five thousand, one hundred twenty-one".