4020123123 has 16 divisors (see below), whose sum is σ = 5956720800. Its totient is φ = 2679639840.

The previous prime is 4020123109. The next prime is 4020123137. The reversal of 4020123123 is 3213210204.

It is an interprime number because it is at equal distance from previous prime (4020123109) and next prime (4020123137).

It is not a de Polignac number, because 4020123123 - 2⁸ = 4020122867 is a prime.

It is a super-2 number, since 2×4020123123² = 32322779848158546258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4020123096 and 4020123105.

It is not an unprimeable number, because it can be changed into a prime (4020123823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286393 + ... + 300101.

It is an arithmetic number, because the mean of its divisors is an integer number (372295050).

Almost surely, 2^4020123123 is an apocalyptic number.

4020123123 is a deficient number, since it is larger than the sum of its proper divisors (1936597677).

4020123123 is a wasteful number, since it uses less digits than its factorization.

4020123123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24579 (or 24573 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 4020123123 is about 63404.4408775915. The cubic root of 4020123123 is about 1590.0585560493.

Adding to 4020123123 its reverse (3213210204), we get a palindrome (7233333327).

The spelling of 4020123123 in words is "four billion, twenty million, one hundred twenty-three thousand, one hundred twenty-three".