233111011111261 has 2 divisors, whose sum is σ = 233111011111262. Its totient is φ = 233111011111260.

The previous prime is 233111011111211. The next prime is 233111011111289. The reversal of 233111011111261 is 162111110111332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207182486007225 + 25928525104036 = 14393835^2 + 5092006^2 .

It is a cyclic number.

It is not a de Polignac number, because 233111011111261 - 2⁴⁵ = 197926639022429 is a prime.

It is a super-4 number, since 4×233111011111261⁴ (a number of 59 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233111011111211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116555505555630 + 116555505555631.

It is an arithmetic number, because the mean of its divisors is an integer number (116555505555631).

Almost surely, 2^{233111011111261} is an apocalyptic number.

It is an amenable number.

233111011111261 is a deficient number, since it is larger than the sum of its proper divisors (1).

233111011111261 is an equidigital number, since it uses as much as digits as its factorization.

233111011111261 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 25.

Adding to 233111011111261 its reverse (162111110111332), we get a palindrome (395222121222593).

The spelling of 233111011111261 in words is "two hundred thirty-three trillion, one hundred eleven billion, eleven million, one hundred eleven thousand, two hundred sixty-one".