21201200012212 has 24 divisors (see below), whose sum is σ = 40475201558400. Its totient is φ = 9636865440960.

The previous prime is 21201200012207. The next prime is 21201200012233. The reversal of 21201200012212 is 21221000210212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9997968 + ... + 11931544.

It is an arithmetic number, because the mean of its divisors is an integer number (1686466731600).

Almost surely, 2^{21201200012212} is an apocalyptic number.

21201200012212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21201200012212 is a deficient number, since it is larger than the sum of its proper divisors (19274001546188).

21201200012212 is a wasteful number, since it uses less digits than its factorization.

21201200012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182791 (or 2182789 counting only the distinct ones).

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

Adding to 21201200012212 its reverse (21221000210212), we get a palindrome (42422200222424).

The spelling of 21201200012212 in words is "twenty-one trillion, two hundred one billion, two hundred million, twelve thousand, two hundred twelve".