201234021 has 4 divisors (see below), whose sum is σ = 268312032. Its totient is φ = 134156012.

The previous prime is 201234013. The next prime is 201234037. The reversal of 201234021 is 120432102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201234021 - 2³ = 201234013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201234071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33539001 + ... + 33539006.

It is an arithmetic number, because the mean of its divisors is an integer number (67078008).

Almost surely, 2^201234021 is an apocalyptic number.

It is an amenable number.

201234021 is a deficient number, since it is larger than the sum of its proper divisors (67078011).

201234021 is an equidigital number, since it uses as much as digits as its factorization.

201234021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67078010.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 201234021 is about 14185.6977621829. The cubic root of 201234021 is about 586.0038487868.

Adding to 201234021 its reverse (120432102), we get a palindrome (321666123).

The spelling of 201234021 in words is "two hundred one million, two hundred thirty-four thousand, twenty-one".