21012220000122 has 32 divisors (see below), whose sum is σ = 47224788766848. Its totient is φ = 6184198527936.

The previous prime is 21012220000097. The next prime is 21012220000129. The reversal of 21012220000122 is 22100002221012.

It is not an unprimeable number, because it can be changed into a prime (21012220000129) 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, 5856246813 + ... + 5856250400.

It is an arithmetic number, because the mean of its divisors is an integer number (1475774648964).

Almost surely, 2^{21012220000122} is an apocalyptic number.

21012220000122 is an abundant number, since it is smaller than the sum of its proper divisors (26212568766726).

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

21012220000122 is a wasteful number, since it uses less digits than its factorization.

21012220000122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11712497254.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21012220000122 its reverse (22100002221012), we get a palindrome (43112222221134).

The spelling of 21012220000122 in words is "twenty-one trillion, twelve billion, two hundred twenty million, one hundred twenty-two", and thus it is an aban number.