220021323212 has 6 divisors (see below), whose sum is σ = 385037315628. Its totient is φ = 110010661604.

The previous prime is 220021323199. The next prime is 220021323229. The reversal of 220021323212 is 212323120022.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27502665398 + ... + 27502665405.

It is an arithmetic number, because the mean of its divisors is an integer number (64172885938).

Almost surely, 2^220021323212 is an apocalyptic number.

It is an amenable number.

220021323212 is a deficient number, since it is larger than the sum of its proper divisors (165015992416).

220021323212 is a wasteful number, since it uses less digits than its factorization.

220021323212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55005330807 (or 55005330805 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 220021323212 its reverse (212323120022), we get a palindrome (432344443234).

The spelling of 220021323212 in words is "two hundred twenty billion, twenty-one million, three hundred twenty-three thousand, two hundred twelve".