22121001210 has 128 divisors (see below), whose sum is σ = 66233438208. Its totient is φ = 4593600000.

The previous prime is 22121001209. The next prime is 22121001233. The reversal of 22121001210 is 1210012122.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6930715 + ... + 6933905.

It is an arithmetic number, because the mean of its divisors is an integer number (517448736).

Almost surely, 2^22121001210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22121001210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33116719104).

22121001210 is an abundant number, since it is smaller than the sum of its proper divisors (44112436998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22121001210 is a wasteful number, since it uses less digits than its factorization.

22121001210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6220.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 22121001210 its reverse (1210012122), we get a palindrome (23331013332).

It can be divided in two parts, 2 and 2121001210, that added together give a palindrome (2121001212).

The spelling of 22121001210 in words is "twenty-two billion, one hundred twenty-one million, one thousand, two hundred ten".