211312214121 has 4 divisors (see below), whose sum is σ = 281749618832. Its totient is φ = 140874809412.

The previous prime is 211312214119. The next prime is 211312214123. The reversal of 211312214121 is 121412213112.

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 an interprime number because it is at equal distance from previous prime (211312214119) and next prime (211312214123).

It is not a de Polignac number, because 211312214121 - 2¹ = 211312214119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211312214123) 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, 35218702351 + ... + 35218702356.

It is an arithmetic number, because the mean of its divisors is an integer number (70437404708).

Almost surely, 2^211312214121 is an apocalyptic number.

It is an amenable number.

211312214121 is a deficient number, since it is larger than the sum of its proper divisors (70437404711).

211312214121 is an equidigital number, since it uses as much as digits as its factorization.

211312214121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70437404710.

The product of its digits is 192, while the sum is 21.

Adding to 211312214121 its reverse (121412213112), we get a palindrome (332724427233).

The spelling of 211312214121 in words is "two hundred eleven billion, three hundred twelve million, two hundred fourteen thousand, one hundred twenty-one".