21521360122226 has 32 divisors (see below), whose sum is σ = 33976304323200. Its totient is φ = 10204337380864.

The previous prime is 21521360122219. The next prime is 21521360122237. The reversal of 21521360122226 is 62222106312512.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1021376 + ... + 6639723.

It is an arithmetic number, because the mean of its divisors is an integer number (1061759510100).

Almost surely, 2^{21521360122226} is an apocalyptic number.

21521360122226 is a deficient number, since it is larger than the sum of its proper divisors (12454944200974).

21521360122226 is a wasteful number, since it uses less digits than its factorization.

21521360122226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7661650.

The product of its (nonzero) digits is 34560, while the sum is 35.

Adding to 21521360122226 its reverse (62222106312512), we get a palindrome (83743466434738).

The spelling of 21521360122226 in words is "twenty-one trillion, five hundred twenty-one billion, three hundred sixty million, one hundred twenty-two thousand, two hundred twenty-six".