111211233401 has 2 divisors, whose sum is σ = 111211233402. Its totient is φ = 111211233400.

The previous prime is 111211233389. The next prime is 111211233461. The reversal of 111211233401 is 104332112111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76054608400 + 35156625001 = 275780^2 + 187501^2 .

It is a cyclic number.

It is not a de Polignac number, because 111211233401 - 2²⁶ = 111144124537 is a prime.

It is not a weakly prime, because it can be changed into another prime (111211233461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55605616700 + 55605616701.

It is an arithmetic number, because the mean of its divisors is an integer number (55605616701).

Almost surely, 2^111211233401 is an apocalyptic number.

It is an amenable number.

111211233401 is a deficient number, since it is larger than the sum of its proper divisors (1).

111211233401 is an equidigital number, since it uses as much as digits as its factorization.

111211233401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 111211233401 its reverse (104332112111), we get a palindrome (215543345512).

The spelling of 111211233401 in words is "one hundred eleven billion, two hundred eleven million, two hundred thirty-three thousand, four hundred one".