21213560223146 has 64 divisors (see below), whose sum is σ = 32974800883200. Its totient is φ = 10231147390464.

The previous prime is 21213560223143. The next prime is 21213560223181. The reversal of 21213560223146 is 64132206531212.

It is not an unprimeable number, because it can be changed into a prime (21213560223143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 661069070 + ... + 661101158.

It is an arithmetic number, because the mean of its divisors is an integer number (515231263800).

Almost surely, 2^{21213560223146} is an apocalyptic number.

21213560223146 is a deficient number, since it is larger than the sum of its proper divisors (11761240660054).

21213560223146 is a wasteful number, since it uses less digits than its factorization.

21213560223146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32751.

The product of its (nonzero) digits is 103680, while the sum is 38.

Adding to 21213560223146 its reverse (64132206531212), we get a palindrome (85345766754358).

The spelling of 21213560223146 in words is "twenty-one trillion, two hundred thirteen billion, five hundred sixty million, two hundred twenty-three thousand, one hundred forty-six".