201242223221 has 16 divisors (see below), whose sum is σ = 228167936640. Its totient is φ = 175954939200.

The previous prime is 201242223199. The next prime is 201242223233. The reversal of 201242223221 is 122322242102.

It is a cyclic number.

It is not a de Polignac number, because 201242223221 - 2²² = 201238028917 is a prime.

It is a super-2 number, since 2×201242223221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201242223241) 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, 1440176 + ... + 1573718.

It is an arithmetic number, because the mean of its divisors is an integer number (14260496040).

Almost surely, 2^201242223221 is an apocalyptic number.

It is an amenable number.

201242223221 is a deficient number, since it is larger than the sum of its proper divisors (26925713419).

201242223221 is a wasteful number, since it uses less digits than its factorization.

201242223221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139676.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 201242223221 its reverse (122322242102), we get a palindrome (323564465323).

The spelling of 201242223221 in words is "two hundred one billion, two hundred forty-two million, two hundred twenty-three thousand, two hundred twenty-one".