21311301442 has 8 divisors (see below), whose sum is σ = 32444071056. Its totient is φ = 10496611092.

The previous prime is 21311301413. The next prime is 21311301467. The reversal of 21311301442 is 24410311312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79519648 + ... + 79519915.

It is an arithmetic number, because the mean of its divisors is an integer number (4055508882).

Almost surely, 2^21311301442 is an apocalyptic number.

21311301442 is a deficient number, since it is larger than the sum of its proper divisors (11132769614).

21311301442 is a wasteful number, since it uses less digits than its factorization.

21311301442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159039632.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21311301442 its reverse (24410311312), we get a palindrome (45721612754).

The spelling of 21311301442 in words is "twenty-one billion, three hundred eleven million, three hundred one thousand, four hundred forty-two".