2221003665231 has 32 divisors (see below), whose sum is σ = 3374558638080. Its totient is φ = 1288056816000.

The previous prime is 2221003665229. The next prime is 2221003665241. The reversal of 2221003665231 is 1325663001222.

It is a happy number.

It is not a de Polignac number, because 2221003665231 - 2¹ = 2221003665229 is a prime.

It is a super-2 number, since 2×2221003665231² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2221003665192 and 2221003665201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221003665241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7704820 + ... + 7987881.

It is an arithmetic number, because the mean of its divisors is an integer number (105454957440).

Almost surely, 2^{2221003665231} is an apocalyptic number.

2221003665231 is a deficient number, since it is larger than the sum of its proper divisors (1153554972849).

2221003665231 is a wasteful number, since it uses less digits than its factorization.

2221003665231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15692927.

The product of its (nonzero) digits is 25920, while the sum is 33.

Adding to 2221003665231 its reverse (1325663001222), we get a palindrome (3546666666453).

The spelling of 2221003665231 in words is "two trillion, two hundred twenty-one billion, three million, six hundred sixty-five thousand, two hundred thirty-one".