1131201303123 has 32 divisors (see below), whose sum is σ = 1580283878400. Its totient is φ = 718796332800.

The previous prime is 1131201303103. The next prime is 1131201303143. The reversal of 1131201303123 is 3213031021311.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1131201303103) and next prime (1131201303143).

It is not a de Polignac number, because 1131201303123 - 2⁶ = 1131201303059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1131201303123.

It is not an unprimeable number, because it can be changed into a prime (1131201303103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66803968 + ... + 66820898.

It is an arithmetic number, because the mean of its divisors is an integer number (49383871200).

Almost surely, 2^{1131201303123} is an apocalyptic number.

1131201303123 is a deficient number, since it is larger than the sum of its proper divisors (449082575277).

1131201303123 is a wasteful number, since it uses less digits than its factorization.

1131201303123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26763.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1131201303123 its reverse (3213031021311), we get a palindrome (4344232324434).

The spelling of 1131201303123 in words is "one trillion, one hundred thirty-one billion, two hundred one million, three hundred three thousand, one hundred twenty-three".