203213231021 has 8 divisors (see below), whose sum is σ = 205105157400. Its totient is φ = 201321806400.

The previous prime is 203213231003. The next prime is 203213231051. The reversal of 203213231021 is 120132312302.

It can be written as a sum of positive squares in 4 ways, for example, as 116288502121 + 86924728900 = 341011^2 + 294830^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 203213231021 - 2¹⁸ = 203212968877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203213230984 and 203213231002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203213231051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 714371 + ... + 957471.

It is an arithmetic number, because the mean of its divisors is an integer number (25638144675).

Almost surely, 2^203213231021 is an apocalyptic number.

It is an amenable number.

203213231021 is a deficient number, since it is larger than the sum of its proper divisors (1891926379).

203213231021 is a wasteful number, since it uses less digits than its factorization.

203213231021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250879.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 203213231021 its reverse (120132312302), we get a palindrome (323345543323).

The spelling of 203213231021 in words is "two hundred three billion, two hundred thirteen million, two hundred thirty-one thousand, twenty-one".