20011233123 has 12 divisors (see below), whose sum is σ = 33034416688. Its totient is φ = 11434990320.

The previous prime is 20011233097. The next prime is 20011233131. The reversal of 20011233123 is 32133211002.

20011233123 is a `hidden beast` number, since 200 + 112 + 331 + 23 = 666.

It is not a de Polignac number, because 20011233123 - 2⁵ = 20011233091 is a prime.

It is a super-2 number, since 2×20011233123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20011233096 and 20011233105.

It is not an unprimeable number, because it can be changed into a prime (20011233623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158819248 + ... + 158819373.

Almost surely, 2^20011233123 is an apocalyptic number.

20011233123 is a deficient number, since it is larger than the sum of its proper divisors (13023183565).

20011233123 is a wasteful number, since it uses less digits than its factorization.

20011233123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317638634 (or 317638631 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20011233123 its reverse (32133211002), we get a palindrome (52144444125).

The spelling of 20011233123 in words is "twenty billion, eleven million, two hundred thirty-three thousand, one hundred twenty-three".