22121022212101 has 2 divisors, whose sum is σ = 22121022212102. Its totient is φ = 22121022212100.

The previous prime is 22121022212063. The next prime is 22121022212131. The reversal of 22121022212101 is 10121222012122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19005885461476 + 3115136750625 = 4359574^2 + 1764975^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121022212101 - 2⁴³ = 13324929189893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22121022212131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060511106050 + 11060511106051.

It is an arithmetic number, because the mean of its divisors is an integer number (11060511106051).

Almost surely, 2^{22121022212101} is an apocalyptic number.

It is an amenable number.

22121022212101 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121022212101 is an equidigital number, since it uses as much as digits as its factorization.

22121022212101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22121022212101 its reverse (10121222012122), we get a palindrome (32242244224223).

The spelling of 22121022212101 in words is "twenty-two trillion, one hundred twenty-one billion, twenty-two million, two hundred twelve thousand, one hundred one".