21122212022 has 8 divisors (see below), whose sum is σ = 31739002200. Its totient is φ = 10542544624.

The previous prime is 21122211991. The next prime is 21122212039. The reversal of 21122212022 is 22021222112.

It is a happy number.

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

It is a super-2 number, since 2×21122212022² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9279272 + ... + 9281547.

It is an arithmetic number, because the mean of its divisors is an integer number (3967375275).

Almost surely, 2^21122212022 is an apocalyptic number.

21122212022 is a deficient number, since it is larger than the sum of its proper divisors (10616790178).

21122212022 is a wasteful number, since it uses less digits than its factorization.

21122212022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18561390.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21122212022 its reverse (22021222112), we get a palindrome (43143434134).

The spelling of 21122212022 in words is "twenty-one billion, one hundred twenty-two million, two hundred twelve thousand, twenty-two".