1131221100311 has 2 divisors, whose sum is σ = 1131221100312. Its totient is φ = 1131221100310.

The previous prime is 1131221100253. The next prime is 1131221100421. The reversal of 1131221100311 is 1130011221311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1131221100311 - 2²² = 1131216906007 is a prime.

It is a super-2 number, since 2×1131221100311² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1131221100311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131221100511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565610550155 + 565610550156.

It is an arithmetic number, because the mean of its divisors is an integer number (565610550156).

Almost surely, 2^{1131221100311} is an apocalyptic number.

1131221100311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131221100311 is an equidigital number, since it uses as much as digits as its factorization.

1131221100311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 1131221100311 its reverse (1130011221311), we get a palindrome (2261232321622).

The spelling of 1131221100311 in words is "one trillion, one hundred thirty-one billion, two hundred twenty-one million, one hundred thousand, three hundred eleven".