4020123111 has 16 divisors (see below), whose sum is σ = 5402275200. Its totient is φ = 2659052448.

The previous prime is 4020123109. The next prime is 4020123137. The reversal of 4020123111 is 1113210204.

It is not a de Polignac number, because 4020123111 - 2¹ = 4020123109 is a prime.

It is a super-2 number, since 2×4020123111² = 32322779655192636642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020123181) 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, 1056865 + ... + 1060661.

It is an arithmetic number, because the mean of its divisors is an integer number (337642200).

Almost surely, 2^4020123111 is an apocalyptic number.

4020123111 is a deficient number, since it is larger than the sum of its proper divisors (1382152089).

4020123111 is a wasteful number, since it uses less digits than its factorization.

4020123111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6478.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 4020123111 is about 63404.4407829609. The cubic root of 4020123111 is about 1590.0585544672.

Adding to 4020123111 its reverse (1113210204), we get a palindrome (5133333315).

The spelling of 4020123111 in words is "four billion, twenty million, one hundred twenty-three thousand, one hundred eleven".