21002102442222 has 16 divisors (see below), whose sum is σ = 45822768964992. Its totient is φ = 6364273467320.

The previous prime is 21002102442221. The next prime is 21002102442227. The reversal of 21002102442222 is 22224420120012.

It is a junction number, because it is equal to n+sod(n) for n = 21002102442192 and 21002102442201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002102442221) 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, 159106836618 + ... + 159106836749.

It is an arithmetic number, because the mean of its divisors is an integer number (2863923060312).

Almost surely, 2^{21002102442222} is an apocalyptic number.

21002102442222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21002102442222 is an abundant number, since it is smaller than the sum of its proper divisors (24820666522770).

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

21002102442222 is a wasteful number, since it uses less digits than its factorization.

21002102442222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318213673383.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 21002102442222 its reverse (22224420120012), we get a palindrome (43226522562234).

The spelling of 21002102442222 in words is "twenty-one trillion, two billion, one hundred two million, four hundred forty-two thousand, two hundred twenty-two".