21130041442 has 16 divisors (see below), whose sum is σ = 33615294912. Its totient is φ = 9940003920.

The previous prime is 21130041389. The next prime is 21130041467. The reversal of 21130041442 is 24414003112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3762348 + ... + 3767959.

It is an arithmetic number, because the mean of its divisors is an integer number (2100955932).

Almost surely, 2^21130041442 is an apocalyptic number.

21130041442 is a deficient number, since it is larger than the sum of its proper divisors (12485253470).

21130041442 is a wasteful number, since it uses less digits than its factorization.

21130041442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7530393.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21130041442 its reverse (24414003112), we get a palindrome (45544044554).

The spelling of 21130041442 in words is "twenty-one billion, one hundred thirty million, forty-one thousand, four hundred forty-two".