1111121201 has 2 divisors, whose sum is σ = 1111121202. Its totient is φ = 1111121200.

The previous prime is 1111121177. The next prime is 1111121227. The reversal of 1111121201 is 1021211111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 861481201 + 249640000 = 29351^2 + 15800^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111121201 - 2¹⁴ = 1111104817 is a prime.

It is not a weakly prime, because it can be changed into another prime (1111121701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555560600 + 555560601.

It is an arithmetic number, because the mean of its divisors is an integer number (555560601).

Almost surely, 2^1111121201 is an apocalyptic number.

It is an amenable number.

1111121201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111121201 is an equidigital number, since it uses as much as digits as its factorization.

1111121201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

The square root of 1111121201 is about 33333.4846813231. The cubic root of 1111121201 is about 1035.7473038049.

Adding to 1111121201 its reverse (1021211111), we get a palindrome (2132332312).

The spelling of 1111121201 in words is "one billion, one hundred eleven million, one hundred twenty-one thousand, two hundred one".