211101211212 has 24 divisors (see below), whose sum is σ = 497172949056. Its totient is φ = 69709433808.

The previous prime is 211101211207. The next prime is 211101211247. The reversal of 211101211212 is 212112101112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 211101211191 and 211101211200.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82203238 + ... + 82205805.

It is an arithmetic number, because the mean of its divisors is an integer number (20715539544).

Almost surely, 2^211101211212 is an apocalyptic number.

It is an amenable number.

211101211212 is an abundant number, since it is smaller than the sum of its proper divisors (286071737844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211101211212 is a wasteful number, since it uses less digits than its factorization.

211101211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164409157 (or 164409155 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211101211212 its reverse (212112101112), we get a palindrome (423213312324).

The spelling of 211101211212 in words is "two hundred eleven billion, one hundred one million, two hundred eleven thousand, two hundred twelve".