22021220310 has 64 divisors (see below), whose sum is σ = 53796033792. Its totient is φ = 5767825536.

The previous prime is 22021220261. The next prime is 22021220321. The reversal of 22021220310 is 1302212022.

It is a happy number.

It is a super-2 number, since 2×22021220310² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22021220310.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 681684 + ... + 713256.

It is an arithmetic number, because the mean of its divisors is an integer number (840563028).

Almost surely, 2^22021220310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22021220310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26898016896).

22021220310 is an abundant number, since it is smaller than the sum of its proper divisors (31774813482).

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

22021220310 is a wasteful number, since it uses less digits than its factorization.

22021220310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31997.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 22021220310 its reverse (1302212022), we get a palindrome (23323432332).

The spelling of 22021220310 in words is "twenty-two billion, twenty-one million, two hundred twenty thousand, three hundred ten".