11012031123 has 4 divisors (see below), whose sum is σ = 14682708168. Its totient is φ = 7341354080.

The previous prime is 11012031113. The next prime is 11012031137. The reversal of 11012031123 is 32113021011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32113021011 = 3 ⋅10704340337.

It is a cyclic number.

It is not a de Polignac number, because 11012031123 - 2⁸ = 11012030867 is a prime.

It is a super-2 number, since 2×11012031123² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11012031113) 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, 1835338518 + ... + 1835338523.

It is an arithmetic number, because the mean of its divisors is an integer number (3670677042).

Almost surely, 2^11012031123 is an apocalyptic number.

11012031123 is a deficient number, since it is larger than the sum of its proper divisors (3670677045).

11012031123 is an equidigital number, since it uses as much as digits as its factorization.

11012031123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3670677044.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 11012031123 its reverse (32113021011), we get a palindrome (43125052134).

The spelling of 11012031123 in words is "eleven billion, twelve million, thirty-one thousand, one hundred twenty-three".