211221031332 has 12 divisors (see below), whose sum is σ = 492849073136. Its totient is φ = 70407010440.

The previous prime is 211221031321. The next prime is 211221031337. The reversal of 211221031332 is 233130122112.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×211221031332² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211221031299 and 211221031308.

It is not an unprimeable number, because it can be changed into a prime (211221031337) 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, 8800876294 + ... + 8800876317.

Almost surely, 2^211221031332 is an apocalyptic number.

It is an amenable number.

211221031332 is an abundant number, since it is smaller than the sum of its proper divisors (281628041804).

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

211221031332 is a wasteful number, since it uses less digits than its factorization.

211221031332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17601752618 (or 17601752616 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 211221031332 its reverse (233130122112), we get a palindrome (444351153444).

The spelling of 211221031332 in words is "two hundred eleven billion, two hundred twenty-one million, thirty-one thousand, three hundred thirty-two".