23421221242500 has 120 divisors (see below), whose sum is σ = 68953047811648. Its totient is φ = 6185021328000.

The previous prime is 23421221242483. The next prime is 23421221242513. The reversal of 23421221242500 is 524212212432.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 14386867 + ... + 15931866.

Almost surely, 2^{23421221242500} is an apocalyptic number.

23421221242500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23421221242500 is an abundant number, since it is smaller than the sum of its proper divisors (45531826569148).

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

23421221242500 is a wasteful number, since it uses less digits than its factorization.

23421221242500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30318863 (or 30318846 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 23421221242500 its reverse (524212212432), we get a palindrome (23945433454932).

The spelling of 23421221242500 in words is "twenty-three trillion, four hundred twenty-one billion, two hundred twenty-one million, two hundred forty-two thousand, five hundred".