212132112121 has 4 divisors (see below), whose sum is σ = 212133220992. Its totient is φ = 212131003252.

The previous prime is 212132112103. The next prime is 212132112139. The reversal of 212132112121 is 121211231212.

212132112121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (212132112103) and next prime (212132112139).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212132112121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212132142121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185761 + ... + 677326.

It is an arithmetic number, because the mean of its divisors is an integer number (53033305248).

Almost surely, 2^212132112121 is an apocalyptic number.

It is an amenable number.

212132112121 is a deficient number, since it is larger than the sum of its proper divisors (1108871).

212132112121 is an equidigital number, since it uses as much as digits as its factorization.

212132112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108870.

The product of its digits is 96, while the sum is 19.

Adding to 212132112121 its reverse (121211231212), we get a palindrome (333343343333).

The spelling of 212132112121 in words is "two hundred twelve billion, one hundred thirty-two million, one hundred twelve thousand, one hundred twenty-one".