21023548011042 has 32 divisors (see below), whose sum is σ = 42388995384000. Its totient is φ = 6950998786368.

The previous prime is 21023548011029. The next prime is 21023548011047. The reversal of 21023548011042 is 24011084532012.

It is a junction number, because it is equal to n+sod(n) for n = 21023548010994 and 21023548011012.

It is not an unprimeable number, because it can be changed into a prime (21023548011047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15950268 + ... + 17217959.

It is an arithmetic number, because the mean of its divisors is an integer number (1324656105750).

Almost surely, 2^{21023548011042} is an apocalyptic number.

21023548011042 is an abundant number, since it is smaller than the sum of its proper divisors (21365447372958).

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

21023548011042 is a wasteful number, since it uses less digits than its factorization.

21023548011042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33169090.

The product of its (nonzero) digits is 15360, while the sum is 33.

The spelling of 21023548011042 in words is "twenty-one trillion, twenty-three billion, five hundred forty-eight million, eleven thousand, forty-two".