21221202111010 has 192 divisors, whose sum is σ = 44818924852224. Its totient is φ = 7172639129600.

The previous prime is 21221202110989. The next prime is 21221202111023. The reversal of 21221202111010 is 1011120212212.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1009417359 + ... + 1009438381.

It is an arithmetic number, because the mean of its divisors is an integer number (233431900272).

Almost surely, 2^{21221202111010} is an apocalyptic number.

21221202111010 is an abundant number, since it is smaller than the sum of its proper divisors (23597722741214).

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

21221202111010 is a wasteful number, since it uses less digits than its factorization.

21221202111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21469 (or 21452 counting only the distinct ones).

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

Adding to 21221202111010 its reverse (1011120212212), we get a palindrome (22232322323222).

The spelling of 21221202111010 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred two million, one hundred eleven thousand, ten".