21054255344103 has 32 divisors (see below), whose sum is σ = 28902750508800. Its totient is φ = 13622858574336.

The previous prime is 21054255344093. The next prime is 21054255344153. The reversal of 21054255344103 is 30144355245012.

It is not a de Polignac number, because 21054255344103 - 2²¹ = 21054253246951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21054255344153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 694317700 + ... + 694348022.

It is an arithmetic number, because the mean of its divisors is an integer number (903210953400).

Almost surely, 2^{21054255344103} is an apocalyptic number.

21054255344103 is a deficient number, since it is larger than the sum of its proper divisors (7848495164697).

21054255344103 is a wasteful number, since it uses less digits than its factorization.

21054255344103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45711.

The product of its (nonzero) digits is 288000, while the sum is 39.

Subtracting 21054255344103 from its reverse (30144355245012), we obtain a palindrome (9090099900909).

The spelling of 21054255344103 in words is "twenty-one trillion, fifty-four billion, two hundred fifty-five million, three hundred forty-four thousand, one hundred three".