22001240124 has 72 divisors (see below), whose sum is σ = 57115618560. Its totient is φ = 7137512352.

The previous prime is 22001240089. The next prime is 22001240141. The reversal of 22001240124 is 42104210022.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22001240097 and 22001240106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 266547 + ... + 339189.

It is an arithmetic number, because the mean of its divisors is an integer number (793272480).

Almost surely, 2^22001240124 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 22001240124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28557809280).

22001240124 is an abundant number, since it is smaller than the sum of its proper divisors (35114378436).

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

22001240124 is a wasteful number, since it uses less digits than its factorization.

22001240124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72879 (or 72874 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22001240124 its reverse (42104210022), we get a palindrome (64105450146).

The spelling of 22001240124 in words is "twenty-two billion, one million, two hundred forty thousand, one hundred twenty-four".