22121220049 has 2 divisors, whose sum is σ = 22121220050. Its totient is φ = 22121220048.

The previous prime is 22121219999. The next prime is 22121220067. The reversal of 22121220049 is 94002212122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15161489424 + 6959730625 = 123132^2 + 83425^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121220049 - 2¹³ = 22121211857 is a prime.

It is a super-3 number, since 3×22121220049³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (22121220749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060610024 + 11060610025.

It is an arithmetic number, because the mean of its divisors is an integer number (11060610025).

Almost surely, 2^22121220049 is an apocalyptic number.

It is an amenable number.

22121220049 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121220049 is an equidigital number, since it uses as much as digits as its factorization.

22121220049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 22121220049 in words is "twenty-two billion, one hundred twenty-one million, two hundred twenty thousand, forty-nine".