21012212220010 has 64 divisors (see below), whose sum is σ = 44403610558464. Its totient is φ = 7073454412800.

The previous prime is 21012212219963. The next prime is 21012212220011. The reversal of 21012212220010 is 1002221221012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21012212220011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91988202 + ... + 92216341.

It is an arithmetic number, because the mean of its divisors is an integer number (693806414976).

Almost surely, 2^{21012212220010} is an apocalyptic number.

21012212220010 is an abundant number, since it is smaller than the sum of its proper divisors (23391398338454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21012212220010 is a wasteful number, since it uses less digits than its factorization.

21012212220010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184204639.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21012212220010 its reverse (1002221221012), we get a palindrome (22014433441022).

The spelling of 21012212220010 in words is "twenty-one trillion, twelve billion, two hundred twelve million, two hundred twenty thousand, ten".