201223343421 has 64 divisors (see below), whose sum is σ = 306023235840. Its totient is φ = 130629058560.

The previous prime is 201223343393. The next prime is 201223343459. The reversal of 201223343421 is 124343322102.

201223343421 is a `hidden beast` number, since 2 + 0 + 1 + 2 + 233 + 4 + 3 + 421 = 666.

It is not a de Polignac number, because 201223343421 - 2¹¹ = 201223341373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201223343521) 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, 228402901 + ... + 228403781.

It is an arithmetic number, because the mean of its divisors is an integer number (4781613060).

Almost surely, 2^201223343421 is an apocalyptic number.

It is an amenable number.

201223343421 is a deficient number, since it is larger than the sum of its proper divisors (104799892419).

201223343421 is a wasteful number, since it uses less digits than its factorization.

201223343421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1963 (or 1957 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 201223343421 its reverse (124343322102), we get a palindrome (325566665523).

It can be divided in two parts, 201223 and 343421, that added together give a square (544644 = 738²).

The spelling of 201223343421 in words is "two hundred one billion, two hundred twenty-three million, three hundred forty-three thousand, four hundred twenty-one".