1010040123 has 4 divisors (see below), whose sum is σ = 1346720168. Its totient is φ = 673360080.

The previous prime is 1010040113. The next prime is 1010040127. The reversal of 1010040123 is 3210400101.

It is a happy number.

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

It is not a de Polignac number, because 1010040123 - 2¹⁰ = 1010039099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1010040099 and 1010040108.

It is not an unprimeable number, because it can be changed into a prime (1010040127) 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, 168340018 + ... + 168340023.

It is an arithmetic number, because the mean of its divisors is an integer number (336680042).

Almost surely, 2^1010040123 is an apocalyptic number.

1010040123 is a deficient number, since it is larger than the sum of its proper divisors (336680045).

1010040123 is an equidigital number, since it uses as much as digits as its factorization.

1010040123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336680044.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1010040123 is about 31781.1284097969. The cubic root of 1010040123 is about 1003.3355692737.

Adding to 1010040123 its reverse (3210400101), we get a palindrome (4220440224).

The spelling of 1010040123 in words is "one billion, ten million, forty thousand, one hundred twenty-three".