111211020123 has 8 divisors (see below), whose sum is σ = 169464411648. Its totient is φ = 63549154344.

The previous prime is 111211020113. The next prime is 111211020131. The reversal of 111211020123 is 321020112111.

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

It is not a de Polignac number, because 111211020123 - 2¹⁸ = 111210757979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111211020103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2647881411 + ... + 2647881452.

It is an arithmetic number, because the mean of its divisors is an integer number (21183051456).

Almost surely, 2^111211020123 is an apocalyptic number.

111211020123 is a deficient number, since it is larger than the sum of its proper divisors (58253391525).

111211020123 is an equidigital number, since it uses as much as digits as its factorization.

111211020123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5295762873.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 111211020123 its reverse (321020112111), we get a palindrome (432231132234).

The spelling of 111211020123 in words is "one hundred eleven billion, two hundred eleven million, twenty thousand, one hundred twenty-three".