21221112200002 has 192 divisors, whose sum is σ = 39845155004928. Its totient is φ = 8403302476800.

The previous prime is 21221112199993. The next prime is 21221112200009. The reversal of 21221112200002 is 20000221112212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21221112200009) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2094252528 + ... + 2094262660.

It is an arithmetic number, because the mean of its divisors is an integer number (207526848984).

Almost surely, 2^{21221112200002} is an apocalyptic number.

21221112200002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21221112200002 is a deficient number, since it is larger than the sum of its proper divisors (18624042804926).

21221112200002 is a wasteful number, since it uses less digits than its factorization.

21221112200002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10577 (or 10566 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21221112200002 its reverse (20000221112212), we get a palindrome (41221333312214).

The spelling of 21221112200002 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twelve million, two hundred thousand, two".