21122000210212 has 24 divisors (see below), whose sum is σ = 40406619072960. Its totient is φ = 9581194784160.

The previous prime is 21122000210203. The next prime is 21122000210219. The reversal of 21122000210212 is 21201200022112.

It is a happy number.

It is a super-2 number, since 2×21122000210212² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122000210219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 492838387 + ... + 492881242.

It is an arithmetic number, because the mean of its divisors is an integer number (1683609128040).

Almost surely, 2^{21122000210212} is an apocalyptic number.

21122000210212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21122000210212 is a deficient number, since it is larger than the sum of its proper divisors (19284618862748).

21122000210212 is a wasteful number, since it uses less digits than its factorization.

21122000210212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985720131 (or 985720129 counting only the distinct ones).

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

Adding to 21122000210212 its reverse (21201200022112), we get a palindrome (42323200232324).

The spelling of 21122000210212 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred ten thousand, two hundred twelve".