11331020201231 has 2 divisors, whose sum is σ = 11331020201232. Its totient is φ = 11331020201230.

The previous prime is 11331020201219. The next prime is 11331020201279. The reversal of 11331020201231 is 13210202013311.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11331020201231 - 2¹⁰ = 11331020200207 is a prime.

It is a super-2 number, since 2×11331020201231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11331020201201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5665510100615 + 5665510100616.

It is an arithmetic number, because the mean of its divisors is an integer number (5665510100616).

Almost surely, 2^{11331020201231} is an apocalyptic number.

11331020201231 is a deficient number, since it is larger than the sum of its proper divisors (1).

11331020201231 is an equidigital number, since it uses as much as digits as its factorization.

11331020201231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 11331020201231 its reverse (13210202013311), we get a palindrome (24541222214542).

The spelling of 11331020201231 in words is "eleven trillion, three hundred thirty-one billion, twenty million, two hundred one thousand, two hundred thirty-one".