211211212212112 has 60 divisors (see below), whose sum is σ = 480746636139996. Its totient is φ = 89622862291200.

The previous prime is 211211212212047. The next prime is 211211212212131. The reversal of 211211212212112 is 211212212112112.

It can be written as a sum of positive squares in 2 ways, for example, as 201357916324096 + 9853295888016 = 14190064^2 + 3138996^2 .

It is a super-2 number, since 2×211211212212112² (a number of 29 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1333594363 + ... + 1333752730.

Almost surely, 2^{211211212212112} is an apocalyptic number.

It is an amenable number.

211211212212112 is an abundant number, since it is smaller than the sum of its proper divisors (269535423927884).

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

211211212212112 is a wasteful number, since it uses less digits than its factorization.

211211212212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2667347216 (or 2667347203 counting only the distinct ones).

The product of its digits is 128, while the sum is 22.

Adding to 211211212212112 its reverse (211212212112112), we get a palindrome (422423424324224).

The spelling of 211211212212112 in words is "two hundred eleven trillion, two hundred eleven billion, two hundred twelve million, two hundred twelve thousand, one hundred twelve".