22021049 has 2 divisors, whose sum is σ = 22021050. Its totient is φ = 22021048.

The previous prime is 22021009. The next prime is 22021093. The reversal of 22021049 is 94012022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21949225 + 71824 = 4685^2 + 268^2 .

It is a cyclic number.

It is not a de Polignac number, because 22021049 - 2⁸ = 22020793 is a prime.

It is a super-3 number, since 3×22021049³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22021049.

It is not a weakly prime, because it can be changed into another prime (22021009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010524 + 11010525.

It is an arithmetic number, because the mean of its divisors is an integer number (11010525).

Almost surely, 2^22021049 is an apocalyptic number.

It is an amenable number.

22021049 is a deficient number, since it is larger than the sum of its proper divisors (1).

22021049 is an equidigital number, since it uses as much as digits as its factorization.

22021049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 22021049 is about 4692.6590543103. The cubic root of 22021049 is about 280.2932684075.

The spelling of 22021049 in words is "twenty-two million, twenty-one thousand, forty-nine".