211212133211 has 4 divisors (see below), whose sum is σ = 212753827752. Its totient is φ = 209670438672.

The previous prime is 211212133157. The next prime is 211212133229. The reversal of 211212133211 is 112331212112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211212133211 - 2³⁰ = 210138391387 is a prime.

It is a super-2 number, since 2×211212133211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211212133711) 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, 770847065 + ... + 770847338.

It is an arithmetic number, because the mean of its divisors is an integer number (53188456938).

Almost surely, 2^211212133211 is an apocalyptic number.

211212133211 is a deficient number, since it is larger than the sum of its proper divisors (1541694541).

211212133211 is a wasteful number, since it uses less digits than its factorization.

211212133211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541694540.

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

Adding to 211212133211 its reverse (112331212112), we get a palindrome (323543345323).

The spelling of 211212133211 in words is "two hundred eleven billion, two hundred twelve million, one hundred thirty-three thousand, two hundred eleven".