111130321261 has 2 divisors, whose sum is σ = 111130321262. Its totient is φ = 111130321260.

The previous prime is 111130321249. The next prime is 111130321273. The reversal of 111130321261 is 162123031111.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (111130321249) and next prime (111130321273).

It can be written as a sum of positive squares in only one way, i.e., 110629412100 + 500909161 = 332610^2 + 22381^2 .

It is a cyclic number.

It is not a de Polignac number, because 111130321261 - 2³⁵ = 76770582893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111130325261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55565160630 + 55565160631.

It is an arithmetic number, because the mean of its divisors is an integer number (55565160631).

Almost surely, 2^111130321261 is an apocalyptic number.

It is an amenable number.

111130321261 is a deficient number, since it is larger than the sum of its proper divisors (1).

111130321261 is an equidigital number, since it uses as much as digits as its factorization.

111130321261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 111130321261 its reverse (162123031111), we get a palindrome (273253352372).

The spelling of 111130321261 in words is "one hundred eleven billion, one hundred thirty million, three hundred twenty-one thousand, two hundred sixty-one".