20221099 has 2 divisors, whose sum is σ = 20221100. Its totient is φ = 20221098.

The previous prime is 20221087. The next prime is 20221127. The reversal of 20221099 is 99012202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20221099 - 2¹⁵ = 20188331 is a prime.

It is not a weakly prime, because it can be changed into another prime (20221009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110549 + 10110550.

It is an arithmetic number, because the mean of its divisors is an integer number (10110550).

Almost surely, 2^20221099 is an apocalyptic number.

20221099 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221099 is an equidigital number, since it uses as much as digits as its factorization.

20221099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 20221099 is about 4496.7876311874. The cubic root of 20221099 is about 272.4383565639.

The spelling of 20221099 in words is "twenty million, two hundred twenty-one thousand, ninety-nine".