1131112121123 has 4 divisors (see below), whose sum is σ = 1144739978088. Its totient is φ = 1117484264160.

The previous prime is 1131112121093. The next prime is 1131112121141. The reversal of 1131112121123 is 3211212111311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1131112121123 - 2¹⁴ = 1131112104739 is a prime.

It is a super-2 number, since 2×1131112121123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131112121095 and 1131112121104.

It is not an unprimeable number, because it can be changed into a prime (1131112121323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6813928358 + ... + 6813928523.

It is an arithmetic number, because the mean of its divisors is an integer number (286184994522).

Almost surely, 2^{1131112121123} is an apocalyptic number.

1131112121123 is a deficient number, since it is larger than the sum of its proper divisors (13627856965).

1131112121123 is an equidigital number, since it uses as much as digits as its factorization.

1131112121123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13627856964.

The product of its digits is 72, while the sum is 20.

Adding to 1131112121123 its reverse (3211212111311), we get a palindrome (4342324232434).

The spelling of 1131112121123 in words is "one trillion, one hundred thirty-one billion, one hundred twelve million, one hundred twenty-one thousand, one hundred twenty-three".