21241121442 has 16 divisors (see below), whose sum is σ = 42683583072. Its totient is φ = 7046817120.

The previous prime is 21241121441. The next prime is 21241121479. The reversal of 21241121442 is 24412114212.

It is a happy number.

It is a super-2 number, since 2×21241121442² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21241121441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8387803 + ... + 8390334.

It is an arithmetic number, because the mean of its divisors is an integer number (2667723942).

Almost surely, 2^21241121442 is an apocalyptic number.

21241121442 is an abundant number, since it is smaller than the sum of its proper divisors (21442461630).

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

21241121442 is a wasteful number, since it uses less digits than its factorization.

21241121442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16778353.

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

Adding to 21241121442 its reverse (24412114212), we get a palindrome (45653235654).

The spelling of 21241121442 in words is "twenty-one billion, two hundred forty-one million, one hundred twenty-one thousand, four hundred forty-two".