21120333442123 has 32 divisors (see below), whose sum is σ = 22473564410880. Its totient is φ = 19779740252160.

The previous prime is 21120333442097. The next prime is 21120333442139. The reversal of 21120333442123 is 32124433302112.

It is not a de Polignac number, because 21120333442123 - 2²¹ = 21120331344971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120333442223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5615614563 + ... + 5615618323.

It is an arithmetic number, because the mean of its divisors is an integer number (702298887840).

Almost surely, 2^{21120333442123} is an apocalyptic number.

21120333442123 is a deficient number, since it is larger than the sum of its proper divisors (1353230968757).

21120333442123 is a wasteful number, since it uses less digits than its factorization.

21120333442123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6027.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 21120333442123 its reverse (32124433302112), we get a palindrome (53244766744235).

The spelling of 21120333442123 in words is "twenty-one trillion, one hundred twenty billion, three hundred thirty-three million, four hundred forty-two thousand, one hundred twenty-three".