1231222202231 has 24 divisors (see below), whose sum is σ = 1494886470624. Its totient is φ = 1009194500160.

The previous prime is 1231222202219. The next prime is 1231222202291. The reversal of 1231222202231 is 1322022221321.

It is a happy number.

It is not a de Polignac number, because 1231222202231 - 2¹⁰ = 1231222201207 is a prime.

It is a super-2 number, since 2×1231222202231² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231222202197 and 1231222202206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231222202291) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4395821 + ... + 4667513.

It is an arithmetic number, because the mean of its divisors is an integer number (62286936276).

Almost surely, 2^{1231222202231} is an apocalyptic number.

1231222202231 is a deficient number, since it is larger than the sum of its proper divisors (263664268393).

1231222202231 is a wasteful number, since it uses less digits than its factorization.

1231222202231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275751 (or 275744 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 1231222202231 its reverse (1322022221321), we get a palindrome (2553244423552).

The spelling of 1231222202231 in words is "one trillion, two hundred thirty-one billion, two hundred twenty-two million, two hundred two thousand, two hundred thirty-one".