221212011201 has 16 divisors (see below), whose sum is σ = 295555107840. Its totient is φ = 147172107600.

The previous prime is 221212011197. The next prime is 221212011221. The reversal of 221212011201 is 102110212122.

It is not a de Polignac number, because 221212011201 - 2² = 221212011197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221212011221) 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, 2859436 + ... + 2935778.

It is an arithmetic number, because the mean of its divisors is an integer number (18472194240).

Almost surely, 2^221212011201 is an apocalyptic number.

It is an amenable number.

221212011201 is a deficient number, since it is larger than the sum of its proper divisors (74343096639).

221212011201 is a wasteful number, since it uses less digits than its factorization.

221212011201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78316.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221212011201 its reverse (102110212122), we get a palindrome (323322223323).

The spelling of 221212011201 in words is "two hundred twenty-one billion, two hundred twelve million, eleven thousand, two hundred one".