21222452110 has 8 divisors (see below), whose sum is σ = 38200413816. Its totient is φ = 8488980840.

The previous prime is 21222452093. The next prime is 21222452113. The reversal of 21222452110 is 1125422212.

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

It is a super-2 number, since 2×21222452110² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222452113) 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, 1061122596 + ... + 1061122615.

It is an arithmetic number, because the mean of its divisors is an integer number (4775051727).

Almost surely, 2^21222452110 is an apocalyptic number.

21222452110 is a deficient number, since it is larger than the sum of its proper divisors (16977961706).

21222452110 is a wasteful number, since it uses less digits than its factorization.

21222452110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122245218.

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 21222452110 its reverse (1125422212), we get a palindrome (22347874322).

The spelling of 21222452110 in words is "twenty-one billion, two hundred twenty-two million, four hundred fifty-two thousand, one hundred ten".