2221213220331 has 16 divisors (see below), whose sum is σ = 3384731866368. Its totient is φ = 1269254944800.

The previous prime is 2221213220263. The next prime is 2221213220357. The reversal of 2221213220331 is 1330223121222.

It is not a de Polignac number, because 2221213220331 - 2¹⁷ = 2221213089259 is a prime.

It is a super-2 number, since 2×2221213220331² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2221213220381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3092361 + ... + 3742341.

It is an arithmetic number, because the mean of its divisors is an integer number (211545741648).

Almost surely, 2^{2221213220331} is an apocalyptic number.

2221213220331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2221213220331 is a deficient number, since it is larger than the sum of its proper divisors (1163518646037).

2221213220331 is a wasteful number, since it uses less digits than its factorization.

2221213220331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812722.

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

Adding to 2221213220331 its reverse (1330223121222), we get a palindrome (3551436341553).

The spelling of 2221213220331 in words is "two trillion, two hundred twenty-one billion, two hundred thirteen million, two hundred twenty thousand, three hundred thirty-one".