221021000010212 has 12 divisors (see below), whose sum is σ = 387047915963436. Its totient is φ = 110435881163520.

The previous prime is 221021000010199. The next prime is 221021000010263. The reversal of 221021000010212 is 212010000120122.

It can be written as a sum of positive squares in 2 ways, for example, as 47520838583296 + 173500161426916 = 6893536^2 + 13171946^2 .

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, 18654703733 + ... + 18654715580.

It is an arithmetic number, because the mean of its divisors is an integer number (32253992996953).

Almost surely, 2^{221021000010212} is an apocalyptic number.

It is an amenable number.

221021000010212 is a deficient number, since it is larger than the sum of its proper divisors (166026915953224).

221021000010212 is a wasteful number, since it uses less digits than its factorization.

221021000010212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37309420798 (or 37309420796 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221021000010212 its reverse (212010000120122), we get a palindrome (433031000130334).

The spelling of 221021000010212 in words is "two hundred twenty-one trillion, twenty-one billion, ten thousand, two hundred twelve".