21415011501044 has 192 divisors, whose sum is σ = 46481341294080. Its totient is φ = 8428271616000.

The previous prime is 21415011500959. The next prime is 21415011501053. The reversal of 21415011501044 is 44010511051412.

It is a junction number, because it is equal to n+sod(n) for n = 21415011500998 and 21415011501016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2423330594 + ... + 2423339430.

It is an arithmetic number, because the mean of its divisors is an integer number (242090319240).

Almost surely, 2^{21415011501044} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21415011501044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23240670647040).

21415011501044 is an abundant number, since it is smaller than the sum of its proper divisors (25066329793036).

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

21415011501044 is a wasteful number, since it uses less digits than its factorization.

21415011501044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9610 (or 9608 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 29.

Adding to 21415011501044 its reverse (44010511051412), we get a palindrome (65425522552456).

The spelling of 21415011501044 in words is "twenty-one trillion, four hundred fifteen billion, eleven million, five hundred one thousand, forty-four".