220131221332 has 36 divisors (see below), whose sum is σ = 426525118740. Its totient is φ = 99329253760.

The previous prime is 220131221311. The next prime is 220131221351. The reversal of 220131221332 is 233122131022.

It can be written as a sum of positive squares in 2 ways, for example, as 167408632336 + 52722588996 = 409156^2 + 229614^2 .

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

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, 1593607 + ... + 1726222.

It is an arithmetic number, because the mean of its divisors is an integer number (11847919965).

Almost surely, 2^220131221332 is an apocalyptic number.

220131221332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

220131221332 is a deficient number, since it is larger than the sum of its proper divisors (206393897408).

220131221332 is a wasteful number, since it uses less digits than its factorization.

220131221332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3319992 (or 3319979 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 220131221332 its reverse (233122131022), we get a palindrome (453253352354).

The spelling of 220131221332 in words is "two hundred twenty billion, one hundred thirty-one million, two hundred twenty-one thousand, three hundred thirty-two".