212134214021 has 4 divisors (see below), whose sum is σ = 212135137344. Its totient is φ = 212133290700.

The previous prime is 212134214011. The next prime is 212134214023. The reversal of 212134214021 is 120412431212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 212134214021 - 2⁶ = 212134213957 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 (212134214023) 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, 183476 + ... + 676706.

It is an arithmetic number, because the mean of its divisors is an integer number (53033784336).

Almost surely, 2^212134214021 is an apocalyptic number.

It is an amenable number.

212134214021 is a deficient number, since it is larger than the sum of its proper divisors (923323).

212134214021 is an equidigital number, since it uses as much as digits as its factorization.

212134214021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923322.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 212134214021 its reverse (120412431212), we get a palindrome (332546645233).

The spelling of 212134214021 in words is "two hundred twelve billion, one hundred thirty-four million, two hundred fourteen thousand, twenty-one".