21112221010102 has 16 divisors (see below), whose sum is σ = 32760579540960. Its totient is φ = 10192033087488.

The previous prime is 21112221010081. The next prime is 21112221010103. The reversal of 21112221010102 is 20101012221112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112221010103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7264438 + ... + 9746614.

It is an arithmetic number, because the mean of its divisors is an integer number (2047536221310).

Almost surely, 2^{21112221010102} is an apocalyptic number.

21112221010102 is a deficient number, since it is larger than the sum of its proper divisors (11648358530858).

21112221010102 is a wasteful number, since it uses less digits than its factorization.

21112221010102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2628855.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21112221010102 its reverse (20101012221112), we get a palindrome (41213233231214).

It can be divided in two parts, 21112221010 and 102, that added together give a palindrome (21112221112).

The spelling of 21112221010102 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty-one million, ten thousand, one hundred two".