1223103131 has 32 divisors (see below), whose sum is σ = 1446336000. Its totient is φ = 1025671680.

The previous prime is 1223103121. The next prime is 1223103143. The reversal of 1223103131 is 1313013221.

It is not a de Polignac number, because 1223103131 - 2¹⁴ = 1223086747 is a prime.

It is a super-2 number, since 2×1223103131² = 2991962538124006322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223103121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 451820 + ... + 454518.

It is an arithmetic number, because the mean of its divisors is an integer number (45198000).

Almost surely, 2^1223103131 is an apocalyptic number.

1223103131 is a deficient number, since it is larger than the sum of its proper divisors (223232869).

1223103131 is a wasteful number, since it uses less digits than its factorization.

1223103131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2819.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1223103131 is about 34972.8913731765. The cubic root of 1223103131 is about 1069.4349160520.

Adding to 1223103131 its reverse (1313013221), we get a palindrome (2536116352).

The spelling of 1223103131 in words is "one billion, two hundred twenty-three million, one hundred three thousand, one hundred thirty-one".