22001212210 has 32 divisors (see below), whose sum is σ = 41639410800. Its totient is φ = 8357717760.

The previous prime is 22001212193. The next prime is 22001212223. The reversal of 22001212210 is 1221210022.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 11268459409 + 10732752801 = 106153^2 + 103599^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 604165 + ... + 639544.

Almost surely, 2^22001212210 is an apocalyptic number.

22001212210 is a deficient number, since it is larger than the sum of its proper divisors (19638198590).

22001212210 is a wasteful number, since it uses less digits than its factorization.

22001212210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243806.

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

Adding to 22001212210 its reverse (1221210022), we get a palindrome (23222422232).

The spelling of 22001212210 in words is "twenty-two billion, one million, two hundred twelve thousand, two hundred ten".