212113110021 has 8 divisors (see below), whose sum is σ = 285733124544. Its totient is φ = 139950917760.

The previous prime is 212113109987. The next prime is 212113110047. The reversal of 212113110021 is 120011311212.

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

It is not a de Polignac number, because 212113110021 - 2⁷ = 212113109893 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212113110061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364455225 + ... + 364455806.

It is an arithmetic number, because the mean of its divisors is an integer number (35716640568).

Almost surely, 2^212113110021 is an apocalyptic number.

It is an amenable number.

212113110021 is a deficient number, since it is larger than the sum of its proper divisors (73620014523).

212113110021 is an equidigital number, since it uses as much as digits as its factorization.

212113110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728911131.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 212113110021 its reverse (120011311212), we get a palindrome (332124421233).

The spelling of 212113110021 in words is "two hundred twelve billion, one hundred thirteen million, one hundred ten thousand, twenty-one".