201021003231 has 4 divisors (see below), whose sum is σ = 268028004312. Its totient is φ = 134014002152.

The previous prime is 201021003223. The next prime is 201021003277. The reversal of 201021003231 is 132300120102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201021003231 - 2³ = 201021003223 is a prime.

It is a super-2 number, since 2×201021003231² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201021003231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201021003031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33503500536 + ... + 33503500541.

It is an arithmetic number, because the mean of its divisors is an integer number (67007001078).

Almost surely, 2^201021003231 is an apocalyptic number.

201021003231 is a deficient number, since it is larger than the sum of its proper divisors (67007001081).

201021003231 is an equidigital number, since it uses as much as digits as its factorization.

201021003231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67007001080.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 201021003231 its reverse (132300120102), we get a palindrome (333321123333).

The spelling of 201021003231 in words is "two hundred one billion, twenty-one million, three thousand, two hundred thirty-one".