211111332012 has 144 divisors (see below), whose sum is σ = 629645033472. Its totient is φ = 58379564160.

The previous prime is 211111332011. The next prime is 211111332013. The reversal of 211111332012 is 210233111112.

211111332012 is a `hidden beast` number, since 211 + 111 + 332 + 0 + 12 = 666.

It is an interprime number because it is at equal distance from previous prime (211111332011) and next prime (211111332013).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (211111332011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1721613 + ... + 1840155.

Almost surely, 2^211111332012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211111332012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314822516736).

211111332012 is an abundant number, since it is smaller than the sum of its proper divisors (418533701460).

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

211111332012 is a wasteful number, since it uses less digits than its factorization.

211111332012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118788 (or 118783 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 211111332012 its reverse (210233111112), we get a palindrome (421344443124).

The spelling of 211111332012 in words is "two hundred eleven billion, one hundred eleven million, three hundred thirty-two thousand, twelve".