221202220021101 has 12 divisors (see below), whose sum is σ = 348561073972800. Its totient is φ = 134061951527880.

The previous prime is 221202220021031. The next prime is 221202220021129. The reversal of 221202220021101 is 101120022202122.

It is a happy number.

221202220021101 is a `hidden beast` number, since 221 + 202 + 220 + 0 + 21 + 1 + 0 + 1 = 666.

It is not a de Polignac number, because 221202220021101 - 2³³ = 221193630086509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221202220021141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1117182929301 + ... + 1117182929498.

It is an arithmetic number, because the mean of its divisors is an integer number (29046756164400).

Almost surely, 2^{221202220021101} is an apocalyptic number.

It is an amenable number.

221202220021101 is a deficient number, since it is larger than the sum of its proper divisors (127358853951699).

221202220021101 is a wasteful number, since it uses less digits than its factorization.

221202220021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234365858816 (or 2234365858813 counting only the distinct ones).

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

Adding to 221202220021101 its reverse (101120022202122), we get a palindrome (322322242223223).

The spelling of 221202220021101 in words is "two hundred twenty-one trillion, two hundred two billion, two hundred twenty million, twenty-one thousand, one hundred one".