221021000002212 has 24 divisors (see below), whose sum is σ = 515716178040000. Its totient is φ = 73673593614816.

The previous prime is 221021000002189. The next prime is 221021000002223. The reversal of 221021000002212 is 212200000120122.

It is a junction number, because it is equal to n+sod(n) for n = 221021000002191 and 221021000002200.

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, 4260289 + ... + 21452087.

It is an arithmetic number, because the mean of its divisors is an integer number (21488174085000).

Almost surely, 2^{221021000002212} is an apocalyptic number.

It is an amenable number.

221021000002212 is an abundant number, since it is smaller than the sum of its proper divisors (294695178037788).

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

221021000002212 is a wasteful number, since it uses less digits than its factorization.

221021000002212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18263155 (or 18263153 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221021000002212 its reverse (212200000120122), we get a palindrome (433221000122334).

The spelling of 221021000002212 in words is "two hundred twenty-one trillion, twenty-one billion, two thousand, two hundred twelve".