10201111123 has 4 divisors (see below), whose sum is σ = 11658412720. Its totient is φ = 8743809528.

The previous prime is 10201111121. The next prime is 10201111163. The reversal of 10201111123 is 32111110201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32111110201 = 1741 ⋅18444061.

It is a cyclic number.

It is not a de Polignac number, because 10201111123 - 2¹ = 10201111121 is a prime.

It is a super-2 number, since 2×10201111123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10201111121) 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, 728650788 + ... + 728650801.

It is an arithmetic number, because the mean of its divisors is an integer number (2914603180).

Almost surely, 2^10201111123 is an apocalyptic number.

10201111123 is a deficient number, since it is larger than the sum of its proper divisors (1457301597).

10201111123 is an equidigital number, since it uses as much as digits as its factorization.

10201111123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457301596.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 10201111123 its reverse (32111110201), we get a palindrome (42312221324).

The spelling of 10201111123 in words is "ten billion, two hundred one million, one hundred eleven thousand, one hundred twenty-three".