2221331231220 has 48 divisors (see below), whose sum is σ = 6220443902400. Its totient is φ = 592286761216.

The previous prime is 2221331231213. The next prime is 2221331231233. The reversal of 2221331231220 is 221321331222.

It is a super-2 number, since 2×2221331231220² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1606017 + ... + 2649896.

It is an arithmetic number, because the mean of its divisors is an integer number (129592581300).

Almost surely, 2^{2221331231220} is an apocalyptic number.

2221331231220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221331231220 is an abundant number, since it is smaller than the sum of its proper divisors (3999112671180).

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

2221331231220 is a wasteful number, since it uses less digits than its factorization.

2221331231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4264624 (or 4264622 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 2221331231220 its reverse (221321331222), we get a palindrome (2442652562442).

The spelling of 2221331231220 in words is "two trillion, two hundred twenty-one billion, three hundred thirty-one million, two hundred thirty-one thousand, two hundred twenty".