21112231554123 has 8 divisors (see below), whose sum is σ = 28172000808000. Its totient is φ = 14063641668168.

The previous prime is 21112231554101. The next prime is 21112231554131. The reversal of 21112231554123 is 32145513221112.

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

It is not a de Polignac number, because 21112231554123 - 2¹⁸ = 21112231291979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21112231552123) 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, 2794837573 + ... + 2794845126.

It is an arithmetic number, because the mean of its divisors is an integer number (3521500101000).

Almost surely, 2^{21112231554123} is an apocalyptic number.

21112231554123 is a deficient number, since it is larger than the sum of its proper divisors (7059769253877).

21112231554123 is a wasteful number, since it uses less digits than its factorization.

21112231554123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5589683961.

The product of its digits is 14400, while the sum is 33.

Adding to 21112231554123 its reverse (32145513221112), we get a palindrome (53257744775235).

The spelling of 21112231554123 in words is "twenty-one trillion, one hundred twelve billion, two hundred thirty-one million, five hundred fifty-four thousand, one hundred twenty-three".