2221223212431 has 12 divisors (see below), whose sum is σ = 3216681435240. Its totient is φ = 1477008749040.

The previous prime is 2221223212427. The next prime is 2221223212457. The reversal of 2221223212431 is 1342123221222.

2221223212431 is a `hidden beast` number, since 2 + 2 + 2 + 1 + 223 + 2 + 1 + 2 + 431 = 666.

It is not a de Polignac number, because 2221223212431 - 2² = 2221223212427 is a prime.

It is a super-2 number, since 2×2221223212431² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2221223212395 and 2221223212404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221223212471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 317223465 + ... + 317230466.

It is an arithmetic number, because the mean of its divisors is an integer number (268056786270).

Almost surely, 2^{2221223212431} is an apocalyptic number.

2221223212431 is a deficient number, since it is larger than the sum of its proper divisors (995458222809).

2221223212431 is a wasteful number, since it uses less digits than its factorization.

2221223212431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634454326 (or 634454323 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 2221223212431 its reverse (1342123221222), we get a palindrome (3563346433653).

The spelling of 2221223212431 in words is "two trillion, two hundred twenty-one billion, two hundred twenty-three million, two hundred twelve thousand, four hundred thirty-one".