20002011123 has 4 divisors (see below), whose sum is σ = 26669348168. Its totient is φ = 13334674080.

The previous prime is 20002011103. The next prime is 20002011137. The reversal of 20002011123 is 32111020002.

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

It is not a de Polignac number, because 20002011123 - 2²⁰ = 20000962547 is a prime.

It is a super-2 number, since 2×20002011123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20002011099 and 20002011108.

It is not an unprimeable number, because it can be changed into a prime (20002011103) 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, 3333668518 + ... + 3333668523.

It is an arithmetic number, because the mean of its divisors is an integer number (6667337042).

Almost surely, 2^20002011123 is an apocalyptic number.

20002011123 is a deficient number, since it is larger than the sum of its proper divisors (6667337045).

20002011123 is an equidigital number, since it uses as much as digits as its factorization.

20002011123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6667337044.

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

Adding to 20002011123 its reverse (32111020002), we get a palindrome (52113031125).

The spelling of 20002011123 in words is "twenty billion, two million, eleven thousand, one hundred twenty-three".