21222201220010 has 32 divisors (see below), whose sum is σ = 45555234423552. Its totient is φ = 6959827480320.

The previous prime is 21222201220009. The next prime is 21222201220019. The reversal of 21222201220010 is 1002210222212.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21222201220019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6590744111 + ... + 6590747330.

It is an arithmetic number, because the mean of its divisors is an integer number (1423601075736).

Almost surely, 2^{21222201220010} is an apocalyptic number.

21222201220010 is an abundant number, since it is smaller than the sum of its proper divisors (24333033203542).

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

21222201220010 is a wasteful number, since it uses less digits than its factorization.

21222201220010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13181491478.

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

Adding to 21222201220010 its reverse (1002210222212), we get a palindrome (22224411442222).

The spelling of 21222201220010 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred one million, two hundred twenty thousand, ten".