21023123541084 has 72 divisors (see below), whose sum is σ = 60737711635328. Its totient is φ = 6006187026720.

The previous prime is 21023123541071. The next prime is 21023123541149. The reversal of 21023123541084 is 48014532132012.

21023123541084 is a `hidden beast` number, since 2 + 1 + 0 + 2 + 3 + 1 + 235 + 410 + 8 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 708039 + ... + 6522849.

Almost surely, 2^{21023123541084} is an apocalyptic number.

It is an amenable number.

21023123541084 is an abundant number, since it is smaller than the sum of its proper divisors (39714588094244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21023123541084 is a wasteful number, since it uses less digits than its factorization.

21023123541084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5829175 (or 5829170 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

Adding to 21023123541084 its reverse (48014532132012), we get a palindrome (69037655673096).

The spelling of 21023123541084 in words is "twenty-one trillion, twenty-three billion, one hundred twenty-three million, five hundred forty-one thousand, eighty-four".