21455005240124 has 96 divisors (see below), whose sum is σ = 41855066547840. Its totient is φ = 9571272302592.

The previous prime is 21455005240121. The next prime is 21455005240127. The reversal of 21455005240124 is 42104250055412.

It is an interprime number because it is at equal distance from previous prime (21455005240121) and next prime (21455005240127).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21455005240121) 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, 95405864 + ... + 95630480.

It is an arithmetic number, because the mean of its divisors is an integer number (435990276540).

Almost surely, 2^{21455005240124} is an apocalyptic number.

It is an amenable number.

21455005240124 is a deficient number, since it is larger than the sum of its proper divisors (20400061307716).

21455005240124 is a wasteful number, since it uses less digits than its factorization.

21455005240124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225207 (or 225205 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 35.

Adding to 21455005240124 its reverse (42104250055412), we get a palindrome (63559255295536).

The spelling of 21455005240124 in words is "twenty-one trillion, four hundred fifty-five billion, five million, two hundred forty thousand, one hundred twenty-four".