21122000020212 has 96 divisors (see below), whose sum is σ = 60660123267072. Its totient is φ = 5570447089536.

The previous prime is 21122000020189. The next prime is 21122000020223. The reversal of 21122000020212 is 21202000022112.

It is a super-2 number, since 2×21122000020212² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122000020191 and 21122000020200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33212683 + ... + 33842669.

It is an arithmetic number, because the mean of its divisors is an integer number (631876284032).

Almost surely, 2^{21122000020212} is an apocalyptic number.

It is an amenable number.

21122000020212 is an abundant number, since it is smaller than the sum of its proper divisors (39538123246860).

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

21122000020212 is a wasteful number, since it uses less digits than its factorization.

21122000020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660717 (or 660715 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21122000020212 its reverse (21202000022112), we get a palindrome (42324000042324).

The spelling of 21122000020212 in words is "twenty-one trillion, one hundred twenty-two billion, twenty thousand, two hundred twelve".