22021022 has 4 divisors (see below), whose sum is σ = 33031536. Its totient is φ = 11010510.

The previous prime is 22021009. The next prime is 22021049. The reversal of 22021022 is 22012022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22012022 = 2 ⋅11006011.

It is a junction number, because it is equal to n+sod(n) for n = 22020994 and 22021012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505254 + ... + 5505257.

It is an arithmetic number, because the mean of its divisors is an integer number (8257884).

Almost surely, 2^22021022 is an apocalyptic number.

22021022 is a deficient number, since it is larger than the sum of its proper divisors (11010514).

22021022 is a wasteful number, since it uses less digits than its factorization.

22021022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11010513.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 22021022 is about 4692.6561774756. The cubic root of 22021022 is about 280.2931538516.

Adding to 22021022 its reverse (22012022), we get a palindrome (44033044).

The spelling of 22021022 in words is "twenty-two million, twenty-one thousand, twenty-two".