20020111100123 has 8 divisors (see below), whose sum is σ = 20059695286560. Its totient is φ = 19980527902720.

The previous prime is 20020111100113. The next prime is 20020111100147. The reversal of 20020111100123 is 32100111102002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20020111100123 is a prime.

It is a super-2 number, since 2×20020111100123² (a number of 27 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 = 20020111100098 and 20020111100107.

It is not an unprimeable number, because it can be changed into a prime (20020111100113) 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, 50584283 + ... + 50978523.

It is an arithmetic number, because the mean of its divisors is an integer number (2507461910820).

Almost surely, 2^{20020111100123} is an apocalyptic number.

20020111100123 is a deficient number, since it is larger than the sum of its proper divisors (39584186437).

20020111100123 is an equidigital number, since it uses as much as digits as its factorization.

20020111100123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494517.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20020111100123 its reverse (32100111102002), we get a palindrome (52120222202125).

The spelling of 20020111100123 in words is "twenty trillion, twenty billion, one hundred eleven million, one hundred thousand, one hundred twenty-three".