21000101112222 has 16 divisors (see below), whose sum is σ = 42014348505360. Its totient is φ = 6997675990592.

The previous prime is 21000101112217. The next prime is 21000101112251. The reversal of 21000101112222 is 22221110100012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 589409073 + ... + 589444700.

It is an arithmetic number, because the mean of its divisors is an integer number (2625896781585).

Almost surely, 2^{21000101112222} is an apocalyptic number.

21000101112222 is an abundant number, since it is smaller than the sum of its proper divisors (21014247393138).

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

21000101112222 is a wasteful number, since it uses less digits than its factorization.

21000101112222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178856747.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21000101112222 its reverse (22221110100012), we get a palindrome (43221211212234).

The spelling of 21000101112222 in words is "twenty-one trillion, one hundred one million, one hundred twelve thousand, two hundred twenty-two".