212110212011021 has 4 divisors (see below), whose sum is σ = 212110305776700. Its totient is φ = 212110118245344.

The previous prime is 212110212010913. The next prime is 212110212011101. The reversal of 212110212011021 is 120110212011212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 196166075164900 + 15944136846121 = 14005930^2 + 3993011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212110212011021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212110212911021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43403576 + ... + 48042593.

It is an arithmetic number, because the mean of its divisors is an integer number (53027576444175).

Almost surely, 2^{212110212011021} is an apocalyptic number.

It is an amenable number.

212110212011021 is a deficient number, since it is larger than the sum of its proper divisors (93765679).

212110212011021 is an equidigital number, since it uses as much as digits as its factorization.

212110212011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93765678.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 212110212011021 its reverse (120110212011212), we get a palindrome (332220424022233).

The spelling of 212110212011021 in words is "two hundred twelve trillion, one hundred ten billion, two hundred twelve million, eleven thousand, twenty-one".