10221212212221 has 16 divisors (see below), whose sum is σ = 13901081370624. Its totient is φ = 6679035148464.

The previous prime is 10221212212201. The next prime is 10221212212259. The reversal of 10221212212221 is 12221221212201.

It is not a de Polignac number, because 10221212212221 - 2¹³ = 10221212204029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221212212201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161578791 + ... + 161642036.

It is an arithmetic number, because the mean of its divisors is an integer number (868817585664).

Almost surely, 2^{10221212212221} is an apocalyptic number.

It is an amenable number.

10221212212221 is a deficient number, since it is larger than the sum of its proper divisors (3679869158403).

10221212212221 is a wasteful number, since it uses less digits than its factorization.

10221212212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323221040.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 10221212212221 its reverse (12221221212201), we get a palindrome (22442433424422).

The spelling of 10221212212221 in words is "ten trillion, two hundred twenty-one billion, two hundred twelve million, two hundred twelve thousand, two hundred twenty-one".