221221201010202 has 48 divisors (see below), whose sum is σ = 479691921852000. Its totient is φ = 73682055701856.

The previous prime is 221221201010197. The next prime is 221221201010207. The reversal of 221221201010202 is 202010102122122.

It is a happy number.

221221201010202 is a `hidden beast` number, since 221 + 22 + 120 + 101 + 0 + 202 = 666.

It is an interprime number because it is at equal distance from previous prime (221221201010197) and next prime (221221201010207).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (221221201010207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 218507853 + ... + 219517935.

It is an arithmetic number, because the mean of its divisors is an integer number (9993581705250).

Almost surely, 2^{221221201010202} is an apocalyptic number.

221221201010202 is an abundant number, since it is smaller than the sum of its proper divisors (258470720841798).

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

221221201010202 is a wasteful number, since it uses less digits than its factorization.

221221201010202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019707 (or 1019704 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221221201010202 its reverse (202010102122122), we get a palindrome (423231303132324).

The spelling of 221221201010202 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, two hundred one million, ten thousand, two hundred two".