21130401442 has 16 divisors (see below), whose sum is σ = 32609352672. Its totient is φ = 10264937760.

The previous prime is 21130401433. The next prime is 21130401493. The reversal of 21130401442 is 24410403112.

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, 1070284 + ... + 1089847.

It is an arithmetic number, because the mean of its divisors is an integer number (2038084542).

Almost surely, 2^21130401442 is an apocalyptic number.

21130401442 is a deficient number, since it is larger than the sum of its proper divisors (11478951230).

21130401442 is a wasteful number, since it uses less digits than its factorization.

21130401442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2160273.

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

Adding to 21130401442 its reverse (24410403112), we get a palindrome (45540804554).

The spelling of 21130401442 in words is "twenty-one billion, one hundred thirty million, four hundred one thousand, four hundred forty-two".