210122212200021 has 48 divisors (see below), whose sum is σ = 356520240573120. Its totient is φ = 117824352898560.

The previous prime is 210122212200011. The next prime is 210122212200053. The reversal of 210122212200021 is 120002212221012.

It is a happy number.

210122212200021 is a `hidden beast` number, since 210 + 1 + 22 + 212 + 200 + 0 + 21 = 666.

It is not a de Polignac number, because 210122212200021 - 2¹¹ = 210122212197973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210122212199967 and 210122212200003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210122212200001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1057949850 + ... + 1058148443.

It is an arithmetic number, because the mean of its divisors is an integer number (7427505011940).

Almost surely, 2^{210122212200021} is an apocalyptic number.

It is an amenable number.

210122212200021 is a deficient number, since it is larger than the sum of its proper divisors (146398028373099).

210122212200021 is a wasteful number, since it uses less digits than its factorization.

210122212200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116098386 (or 2116098383 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 210122212200021 its reverse (120002212221012), we get a palindrome (330124424421033).

The spelling of 210122212200021 in words is "two hundred ten trillion, one hundred twenty-two billion, two hundred twelve million, two hundred thousand, twenty-one".