1111220431 has 2 divisors, whose sum is σ = 1111220432. Its totient is φ = 1111220430.

The previous prime is 1111220333. The next prime is 1111220437. The reversal of 1111220431 is 1340221111.

It is a strong prime.

It is an emirp because it is prime and its reverse (1340221111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1111220431 - 2⁷ = 1111220303 is a prime.

It is a super-2 number, since 2×1111220431² = 2469621692543651522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111220437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555610215 + 555610216.

It is an arithmetic number, because the mean of its divisors is an integer number (555610216).

Almost surely, 2^1111220431 is an apocalyptic number.

1111220431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111220431 is an equidigital number, since it uses as much as digits as its factorization.

1111220431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1111220431 is about 33334.9730913346. The cubic root of 1111220431 is about 1035.7781357686.

Adding to 1111220431 its reverse (1340221111), we get a palindrome (2451441542).

The spelling of 1111220431 in words is "one billion, one hundred eleven million, two hundred twenty thousand, four hundred thirty-one".