212110010011021 has 16 divisors (see below), whose sum is σ = 225626613698160. Its totient is φ = 198710052782080.

The previous prime is 212110010010991. The next prime is 212110010011049. The reversal of 212110010011021 is 120110010011212.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 73815349995396 + 138294660015625 = 8591586^2 + 11759875^2 .

It is not a de Polignac number, because 212110010011021 - 2⁷ = 212110010010893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212110010010992 and 212110010011010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212110010011321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11889526 + ... + 23781943.

It is an arithmetic number, because the mean of its divisors is an integer number (14101663356135).

Almost surely, 2^{212110010011021} is an apocalyptic number.

It is an amenable number.

212110010011021 is a deficient number, since it is larger than the sum of its proper divisors (13516603687139).

212110010011021 is a wasteful number, since it uses less digits than its factorization.

212110010011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35673104.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 212110010011021 its reverse (120110010011212), we get a palindrome (332220020022233).

The spelling of 212110010011021 in words is "two hundred twelve trillion, one hundred ten billion, ten million, eleven thousand, twenty-one".