201342021321 has 64 divisors (see below), whose sum is σ = 340086878208. Its totient is φ = 103238074368.

The previous prime is 201342021319. The next prime is 201342021323. The reversal of 201342021321 is 123120243102.

It is an interprime number because it is at equal distance from previous prime (201342021319) and next prime (201342021323).

It is not a de Polignac number, because 201342021321 - 2¹ = 201342021319 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (201342021323) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2480841 + ... + 2560713.

It is an arithmetic number, because the mean of its divisors is an integer number (5313857472).

Almost surely, 2^201342021321 is an apocalyptic number.

201342021321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201342021321 is a deficient number, since it is larger than the sum of its proper divisors (138744856887).

201342021321 is a wasteful number, since it uses less digits than its factorization.

201342021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80230.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 201342021321 its reverse (123120243102), we get a palindrome (324462264423).

The spelling of 201342021321 in words is "two hundred one billion, three hundred forty-two million, twenty-one thousand, three hundred twenty-one".