21320105342522 has 16 divisors (see below), whose sum is σ = 36549020187072. Its totient is φ = 9137120961120.

The previous prime is 21320105342513. The next prime is 21320105342533. The reversal of 21320105342522 is 22524350102312.

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, 3586004 + ... + 7449807.

It is an arithmetic number, because the mean of its divisors is an integer number (2284313761692).

Almost surely, 2^{21320105342522} is an apocalyptic number.

21320105342522 is a deficient number, since it is larger than the sum of its proper divisors (15228914844550).

21320105342522 is a wasteful number, since it uses less digits than its factorization.

21320105342522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11173813.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 21320105342522 its reverse (22524350102312), we get a palindrome (43844455444834).

The spelling of 21320105342522 in words is "twenty-one trillion, three hundred twenty billion, one hundred five million, three hundred forty-two thousand, five hundred twenty-two".