21122000121212 has 12 divisors (see below), whose sum is σ = 36966388300800. Its totient is φ = 10560174892416.

The previous prime is 21122000121197. The next prime is 21122000121221. The reversal of 21122000121212 is 21212100022112.

It is a super-2 number, since 2×21122000121212² (a number of 27 digits) contains 22 as substring.

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, 206234453 + ... + 206336844.

It is an arithmetic number, because the mean of its divisors is an integer number (3080532358400).

Almost surely, 2^{21122000121212} is an apocalyptic number.

It is an amenable number.

21122000121212 is a deficient number, since it is larger than the sum of its proper divisors (15844388179588).

21122000121212 is a wasteful number, since it uses less digits than its factorization.

21122000121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412584100 (or 412584098 counting only the distinct ones).

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

Adding to 21122000121212 its reverse (21212100022112), we get a palindrome (42334100143324).

The spelling of 21122000121212 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twenty-one thousand, two hundred twelve".