21241421124 has 48 divisors (see below), whose sum is σ = 61793227776. Its totient is φ = 5517252000.

The previous prime is 21241421119. The next prime is 21241421141. The reversal of 21241421124 is 42112414212.

It is a happy number.

It is a super-2 number, since 2×21241421124² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21241421094 and 21241421103.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11493352 + ... + 11495199.

It is an arithmetic number, because the mean of its divisors is an integer number (1287358912).

Almost surely, 2^21241421124 is an apocalyptic number.

It is an amenable number.

21241421124 is an abundant number, since it is smaller than the sum of its proper divisors (40551806652).

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

21241421124 is a wasteful number, since it uses less digits than its factorization.

21241421124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22988576 (or 22988574 counting only the distinct ones).

The product of its digits is 1024, while the sum is 24.

Adding to 21241421124 its reverse (42112414212), we get a palindrome (63353835336).

The spelling of 21241421124 in words is "twenty-one billion, two hundred forty-one million, four hundred twenty-one thousand, one hundred twenty-four".