21255354123096 has 256 divisors, whose sum is σ = 59747922432000. Its totient is φ = 6269877411840.

The previous prime is 21255354123049. The next prime is 21255354123109. The reversal of 21255354123096 is 69032145355212.

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, 2161629796 + ... + 2161639628.

It is an arithmetic number, because the mean of its divisors is an integer number (233390322000).

Almost surely, 2^{21255354123096} 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 21255354123096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29873961216000).

21255354123096 is an abundant number, since it is smaller than the sum of its proper divisors (38492568308904).

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

21255354123096 is a wasteful number, since it uses less digits than its factorization.

21255354123096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15194 (or 15190 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 21255354123096 in words is "twenty-one trillion, two hundred fifty-five billion, three hundred fifty-four million, one hundred twenty-three thousand, ninety-six".