21221102022112 has 24 divisors (see below), whose sum is σ = 41779425807000. Its totient is φ = 10610454198144.

The previous prime is 21221102022103. The next prime is 21221102022143. The reversal of 21221102022112 is 21122020112212.

It is a self number, because there is not a number n which added to its sum of digits gives 21221102022112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 603514 + ... + 6542662.

It is an arithmetic number, because the mean of its divisors is an integer number (1740809408625).

Almost surely, 2^{21221102022112} is an apocalyptic number.

It is an amenable number.

21221102022112 is a deficient number, since it is larger than the sum of its proper divisors (20558323784888).

21221102022112 is a wasteful number, since it uses less digits than its factorization.

21221102022112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6050818 (or 6050810 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21221102022112 its reverse (21122020112212), we get a palindrome (42343122134324).

The spelling of 21221102022112 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred two million, twenty-two thousand, one hundred twelve".