221212120110201 has 80 divisors (see below), whose sum is σ = 362104731857088. Its totient is φ = 133468928841600.

The previous prime is 221212120110187. The next prime is 221212120110253. The reversal of 221212120110201 is 102011021212122.

221212120110201 is a `hidden beast` number, since 2 + 21 + 212 + 120 + 110 + 201 = 666.

It is not a de Polignac number, because 221212120110201 - 2⁵ = 221212120110169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221212120110301) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5002400271 + ... + 5002444491.

Almost surely, 2^{221212120110201} is an apocalyptic number.

It is an amenable number.

221212120110201 is a deficient number, since it is larger than the sum of its proper divisors (140892611746887).

221212120110201 is a wasteful number, since it uses less digits than its factorization.

221212120110201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69204 (or 69195 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221212120110201 its reverse (102011021212122), we get a palindrome (323223141322323).

It can be divided in two parts, 2212121 and 20110201, that added together give a palindrome (22322322).

The spelling of 221212120110201 in words is "two hundred twenty-one trillion, two hundred twelve billion, one hundred twenty million, one hundred ten thousand, two hundred one".