113213203261 has 2 divisors, whose sum is σ = 113213203262. Its totient is φ = 113213203260.

The previous prime is 113213203189. The next prime is 113213203277. The reversal of 113213203261 is 162302312311.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99607147236 + 13606056025 = 315606^2 + 116645^2 .

It is a cyclic number.

It is not a de Polignac number, because 113213203261 - 2¹⁵ = 113213170493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113213203361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56606601630 + 56606601631.

It is an arithmetic number, because the mean of its divisors is an integer number (56606601631).

Almost surely, 2^113213203261 is an apocalyptic number.

It is an amenable number.

113213203261 is a deficient number, since it is larger than the sum of its proper divisors (1).

113213203261 is an equidigital number, since it uses as much as digits as its factorization.

113213203261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 113213203261 its reverse (162302312311), we get a palindrome (275515515572).

The spelling of 113213203261 in words is "one hundred thirteen billion, two hundred thirteen million, two hundred three thousand, two hundred sixty-one".