212110122000021 has 8 divisors (see below), whose sum is σ = 323215424000064. Its totient is φ = 121205784000000.

The previous prime is 212110122000013. The next prime is 212110122000047. The reversal of 212110122000021 is 120000221011212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212110122000021 - 2³ = 212110122000013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212110122000121) 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, 5050240999980 + ... + 5050241000021.

It is an arithmetic number, because the mean of its divisors is an integer number (40401928000008).

Almost surely, 2^{212110122000021} is an apocalyptic number.

212110122000021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212110122000021 is a deficient number, since it is larger than the sum of its proper divisors (111105302000043).

212110122000021 is a wasteful number, since it uses less digits than its factorization.

212110122000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10100482000011.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212110122000021 its reverse (120000221011212), we get a palindrome (332110343011233).

The spelling of 212110122000021 in words is "two hundred twelve trillion, one hundred ten billion, one hundred twenty-two million, twenty-one", and thus it is an aban number.