202144431221 has 16 divisors (see below), whose sum is σ = 210219444288. Its totient is φ = 194220681600.

The previous prime is 202144431197. The next prime is 202144431277. The reversal of 202144431221 is 122134441202.

It is a cyclic number.

It is not a de Polignac number, because 202144431221 - 2⁶ = 202144431157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202144431421) 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, 15055091 + ... + 15068511.

It is an arithmetic number, because the mean of its divisors is an integer number (13138715268).

Almost surely, 2^202144431221 is an apocalyptic number.

It is an amenable number.

202144431221 is a deficient number, since it is larger than the sum of its proper divisors (8075013067).

202144431221 is a wasteful number, since it uses less digits than its factorization.

202144431221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19012.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 202144431221 its reverse (122134441202), we get a palindrome (324278872423).

The spelling of 202144431221 in words is "two hundred two billion, one hundred forty-four million, four hundred thirty-one thousand, two hundred twenty-one".