22121020210 has 8 divisors (see below), whose sum is σ = 39817836396. Its totient is φ = 8848408080.

The previous prime is 22121020193. The next prime is 22121020217. The reversal of 22121020210 is 1202012122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21167631081 + 953389129 = 145491^2 + 30877^2 .

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

It is not an unprimeable number, because it can be changed into a prime (22121020217) 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, 1106051001 + ... + 1106051020.

Almost surely, 2^22121020210 is an apocalyptic number.

22121020210 is a deficient number, since it is larger than the sum of its proper divisors (17696816186).

22121020210 is a wasteful number, since it uses less digits than its factorization.

22121020210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2212102028.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22121020210 its reverse (1202012122), we get a palindrome (23323032332).

The spelling of 22121020210 in words is "twenty-two billion, one hundred twenty-one million, twenty thousand, two hundred ten".