211122312 has 16 divisors (see below), whose sum is σ = 527805840. Its totient is φ = 70374096.

The previous prime is 211122299. The next prime is 211122341. The reversal of 211122312 is 213221112.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 211122291 and 211122300.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4398358 + ... + 4398405.

It is an arithmetic number, because the mean of its divisors is an integer number (32987865).

Almost surely, 2^211122312 is an apocalyptic number.

It is an amenable number.

211122312 is an abundant number, since it is smaller than the sum of its proper divisors (316683528).

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

211122312 is a wasteful number, since it uses less digits than its factorization.

211122312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8796772 (or 8796768 counting only the distinct ones).

The product of its digits is 48, while the sum is 15.

The square root of 211122312 is about 14530.0485890447. The cubic root of 211122312 is about 595.4491930815.

Adding to 211122312 its reverse (213221112), we get a palindrome (424343424).

The spelling of 211122312 in words is "two hundred eleven million, one hundred twenty-two thousand, three hundred twelve".