211412121 has 4 divisors (see below), whose sum is σ = 281882832. Its totient is φ = 140941412.

The previous prime is 211412081. The next prime is 211412143. The reversal of 211412121 is 121214112.

211412121 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211412121 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 211412121.

It is not an unprimeable number, because it can be changed into a prime (211412171) 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, 35235351 + ... + 35235356.

It is an arithmetic number, because the mean of its divisors is an integer number (70470708).

Almost surely, 2^211412121 is an apocalyptic number.

It is an amenable number.

211412121 is a deficient number, since it is larger than the sum of its proper divisors (70470711).

211412121 is an equidigital number, since it uses as much as digits as its factorization.

211412121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70470710.

The product of its digits is 32, while the sum is 15.

The square root of 211412121 is about 14540.0179160825. The cubic root of 211412121 is about 595.7215275285.

Adding to 211412121 its reverse (121214112), we get a palindrome (332626233).

The spelling of 211412121 in words is "two hundred eleven million, four hundred twelve thousand, one hundred twenty-one".