22001012022 has 64 divisors (see below), whose sum is σ = 48631726080. Its totient is φ = 6579712800.

The previous prime is 22001011993. The next prime is 22001012027. The reversal of 22001012022 is 22021010022.

It is a junction number, because it is equal to n+sod(n) for n = 22001011989 and 22001012007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001012027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7881447 + ... + 7884237.

It is an arithmetic number, because the mean of its divisors is an integer number (759870720).

Almost surely, 2^22001012022 is an apocalyptic number.

22001012022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 22001012022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24315863040).

22001012022 is an abundant number, since it is smaller than the sum of its proper divisors (26630714058).

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

22001012022 is a wasteful number, since it uses less digits than its factorization.

22001012022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4329.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 22001012022 its reverse (22021010022), we get a palindrome (44022022044).

The spelling of 22001012022 in words is "twenty-two billion, one million, twelve thousand, twenty-two".