1122121181 has 2 divisors, whose sum is σ = 1122121182. Its totient is φ = 1122121180.

The previous prime is 1122121153. The next prime is 1122121201. The reversal of 1122121181 is 1811212211.

It is a happy number.

It is an a-pointer prime, because the next prime (1122121201) can be obtained adding 1122121181 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1047557956 + 74563225 = 32366^2 + 8635^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122121181 - 2²⁶ = 1055012317 is a prime.

It is a super-2 number, since 2×1122121181² = 2518311889697669522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1122121111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561060590 + 561060591.

It is an arithmetic number, because the mean of its divisors is an integer number (561060591).

Almost surely, 2^1122121181 is an apocalyptic number.

It is an amenable number.

1122121181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122121181 is an equidigital number, since it uses as much as digits as its factorization.

1122121181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64, while the sum is 20.

The square root of 1122121181 is about 33498.0772731809. The cubic root of 1122121181 is about 1039.1540152404.

Adding to 1122121181 its reverse (1811212211), we get a palindrome (2933333392).

The spelling of 1122121181 in words is "one billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred eighty-one".