201323022121 has 32 divisors (see below), whose sum is σ = 235036771200. Its totient is φ = 170739201024.

The previous prime is 201323022119. The next prime is 201323022137. The reversal of 201323022121 is 121220323102.

It is a cyclic number.

It is not a de Polignac number, because 201323022121 - 2¹ = 201323022119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201323022161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19941751 + ... + 19951843.

It is an arithmetic number, because the mean of its divisors is an integer number (7344899100).

Almost surely, 2^201323022121 is an apocalyptic number.

It is an amenable number.

201323022121 is a deficient number, since it is larger than the sum of its proper divisors (33713749079).

201323022121 is a wasteful number, since it uses less digits than its factorization.

201323022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12265.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 201323022121 its reverse (121220323102), we get a palindrome (322543345223).

The spelling of 201323022121 in words is "two hundred one billion, three hundred twenty-three million, twenty-two thousand, one hundred twenty-one".