1331221112231 has 16 divisors (see below), whose sum is σ = 1380996909600. Its totient is φ = 1282304701440.

The previous prime is 1331221112227. The next prime is 1331221112401. The reversal of 1331221112231 is 1322111221331.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1331221112231 - 2² = 1331221112227 is a prime.

It is a super-2 number, since 2×1331221112231² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1331221112197 and 1331221112206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331221112531) 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, 36233951 + ... + 36270671.

It is an arithmetic number, because the mean of its divisors is an integer number (86312306850).

Almost surely, 2^{1331221112231} is an apocalyptic number.

1331221112231 is a deficient number, since it is larger than the sum of its proper divisors (49775797369).

1331221112231 is a wasteful number, since it uses less digits than its factorization.

1331221112231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48386.

The product of its digits is 432, while the sum is 23.

Adding to 1331221112231 its reverse (1322111221331), we get a palindrome (2653332333562).

The spelling of 1331221112231 in words is "one trillion, three hundred thirty-one billion, two hundred twenty-one million, one hundred twelve thousand, two hundred thirty-one".