1131100121 has 2 divisors, whose sum is σ = 1131100122. Its totient is φ = 1131100120.

The previous prime is 1131100093. The next prime is 1131100133. The reversal of 1131100121 is 1210011311.

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., 1086691225 + 44408896 = 32965^2 + 6664^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131100121 - 2⁶ = 1131100057 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131100171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565550060 + 565550061.

It is an arithmetic number, because the mean of its divisors is an integer number (565550061).

Almost surely, 2^1131100121 is an apocalyptic number.

It is an amenable number.

1131100121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131100121 is an equidigital number, since it uses as much as digits as its factorization.

1131100121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 1131100121 is about 33631.8319602129. The cubic root of 1131100121 is about 1041.9183408045.

Adding to 1131100121 its reverse (1210011311), we get a palindrome (2341111432).

The spelling of 1131100121 in words is "one billion, one hundred thirty-one million, one hundred thousand, one hundred twenty-one".