21022212022 has 8 divisors (see below), whose sum is σ = 36038077776. Its totient is φ = 9009519432.

The previous prime is 21022212017. The next prime is 21022212023. The reversal of 21022212022 is 22021222012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21022211987 and 21022212005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022212023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750793273 + ... + 750793300.

It is an arithmetic number, because the mean of its divisors is an integer number (4504759722).

Almost surely, 2^21022212022 is an apocalyptic number.

21022212022 is a deficient number, since it is larger than the sum of its proper divisors (15015865754).

21022212022 is a wasteful number, since it uses less digits than its factorization.

21022212022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501586582.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21022212022 its reverse (22021222012), we get a palindrome (43043434034).

The spelling of 21022212022 in words is "twenty-one billion, twenty-two million, two hundred twelve thousand, twenty-two".