212110312130021 has 8 divisors (see below), whose sum is σ = 212171219988288. Its totient is φ = 212049408708000.

The previous prime is 212110312130009. The next prime is 212110312130027. The reversal of 212110312130021 is 120031213011212.

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

It is a cyclic number.

It is not a de Polignac number, because 212110312130021 - 2³⁰ = 212109238388197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212110312129975 and 212110312130002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212110312130027) 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, 95742881 + ... + 97933241.

It is an arithmetic number, because the mean of its divisors is an integer number (26521402498536).

Almost surely, 2^{212110312130021} is an apocalyptic number.

It is an amenable number.

212110312130021 is a deficient number, since it is larger than the sum of its proper divisors (60907858267).

212110312130021 is a wasteful number, since it uses less digits than its factorization.

212110312130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218123.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 212110312130021 its reverse (120031213011212), we get a palindrome (332141525141233).

The spelling of 212110312130021 in words is "two hundred twelve trillion, one hundred ten billion, three hundred twelve million, one hundred thirty thousand, twenty-one".