20211222121199 has 2 divisors, whose sum is σ = 20211222121200. Its totient is φ = 20211222121198.

The previous prime is 20211222121183. The next prime is 20211222121201. The reversal of 20211222121199 is 99112122211202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20211222121199 - 2⁴ = 20211222121183 is a prime.

It is a Sophie Germain prime.

Together with 20211222121201, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20211222121109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105611060599 + 10105611060600.

It is an arithmetic number, because the mean of its divisors is an integer number (10105611060600).

Almost surely, 2^{20211222121199} is an apocalyptic number.

20211222121199 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211222121199 is an equidigital number, since it uses as much as digits as its factorization.

20211222121199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 35.

The spelling of 20211222121199 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred ninety-nine".