20011022123 has 8 divisors (see below), whose sum is σ = 20347227456. Its totient is φ = 19675080000.

The previous prime is 20011022117. The next prime is 20011022149. The reversal of 20011022123 is 32122011002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20011022123 - 2⁴ = 20011022107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20011022098 and 20011022107.

It is not an unprimeable number, because it can be changed into a prime (20011022113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90623 + ... + 219623.

It is an arithmetic number, because the mean of its divisors is an integer number (2543403432).

Almost surely, 2^20011022123 is an apocalyptic number.

20011022123 is a deficient number, since it is larger than the sum of its proper divisors (336205333).

20011022123 is a wasteful number, since it uses less digits than its factorization.

20011022123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131605.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20011022123 its reverse (32122011002), we get a palindrome (52133033125).

The spelling of 20011022123 in words is "twenty billion, eleven million, twenty-two thousand, one hundred twenty-three".