21000112100022 has 128 divisors (see below), whose sum is σ = 49178316423168. Its totient is φ = 5907821875200.

The previous prime is 21000112099927. The next prime is 21000112100027. The reversal of 21000112100022 is 22000121100012.

It is a junction number, because it is equal to n+sod(n) for n = 21000112099980 and 21000112100007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000112100027) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24225522 + ... + 25077402.

It is an arithmetic number, because the mean of its divisors is an integer number (384205597056).

Almost surely, 2^{21000112100022} is an apocalyptic number.

21000112100022 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 21000112100022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24589158211584).

21000112100022 is an abundant number, since it is smaller than the sum of its proper divisors (28178204323146).

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

21000112100022 is a wasteful number, since it uses less digits than its factorization.

21000112100022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852214.

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

Adding to 21000112100022 its reverse (22000121100012), we get a palindrome (43000233200034).

The spelling of 21000112100022 in words is "twenty-one trillion, one hundred twelve million, one hundred thousand, twenty-two".