22145150355221 has 2 divisors, whose sum is σ = 22145150355222. Its totient is φ = 22145150355220.

The previous prime is 22145150355203. The next prime is 22145150355227. The reversal of 22145150355221 is 12255305154122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18125582482225 + 4019567872996 = 4257415^2 + 2004886^2 .

It is a cyclic number.

It is not a de Polignac number, because 22145150355221 - 2²⁶ = 22145083246357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22145150355227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11072575177610 + 11072575177611.

It is an arithmetic number, because the mean of its divisors is an integer number (11072575177611).

Almost surely, 2^{22145150355221} is an apocalyptic number.

It is an amenable number.

22145150355221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22145150355221 is an equidigital number, since it uses as much as digits as its factorization.

22145150355221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120000, while the sum is 38.

The spelling of 22145150355221 in words is "twenty-two trillion, one hundred forty-five billion, one hundred fifty million, three hundred fifty-five thousand, two hundred twenty-one".