21002222121110 has 16 divisors (see below), whose sum is σ = 38157308229456. Its totient is φ = 8322375868128.

The previous prime is 21002222121079. The next prime is 21002222121113. The reversal of 21002222121110 is 1112122220012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002222121113) 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, 9814121417 + ... + 9814123556.

It is an arithmetic number, because the mean of its divisors is an integer number (2384831764341).

Almost surely, 2^{21002222121110} is an apocalyptic number.

21002222121110 is a deficient number, since it is larger than the sum of its proper divisors (17155086108346).

21002222121110 is a wasteful number, since it uses less digits than its factorization.

21002222121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19628245087.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21002222121110 its reverse (1112122220012), we get a palindrome (22114344341122).

The spelling of 21002222121110 in words is "twenty-one trillion, two billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred ten".