1121223031 has 2 divisors, whose sum is σ = 1121223032. Its totient is φ = 1121223030.

The previous prime is 1121223001. The next prime is 1121223043. The reversal of 1121223031 is 1303221211.

It is a strong prime.

It is an emirp because it is prime and its reverse (1303221211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121223031 - 2⁹ = 1121222519 is a prime.

It is a super-2 number, since 2×1121223031² = 2514282170489653922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1121222996 and 1121223014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121223001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560611515 + 560611516.

It is an arithmetic number, because the mean of its divisors is an integer number (560611516).

Almost surely, 2^1121223031 is an apocalyptic number.

1121223031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121223031 is an equidigital number, since it uses as much as digits as its factorization.

1121223031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1121223031 is about 33484.6685962397. The cubic root of 1121223031 is about 1038.8766936476.

Adding to 1121223031 its reverse (1303221211), we get a palindrome (2424444242).

It can be divided in two parts, 11212 and 23031, that added together give a palindrome (34243).

The spelling of 1121223031 in words is "one billion, one hundred twenty-one million, two hundred twenty-three thousand, thirty-one".