32112221220 has 36 divisors (see below), whose sum is σ = 97407071580. Its totient is φ = 8563258944.

The previous prime is 32112221191. The next prime is 32112221231. The reversal of 32112221220 is 2212221123.

32112221220 is a `hidden beast` number, since 321 + 1 + 222 + 122 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7241669604 + 24870551616 = 85098^2 + 157704^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 32112221193 and 32112221202.

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, 89200435 + ... + 89200794.

Almost surely, 2^32112221220 is an apocalyptic number.

32112221220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

32112221220 is an abundant number, since it is smaller than the sum of its proper divisors (65294850360).

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

32112221220 is a wasteful number, since it uses less digits than its factorization.

32112221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178401244 (or 178401239 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 32112221220 its reverse (2212221123), we get a palindrome (34324442343).

The spelling of 32112221220 in words is "thirty-two billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twenty".