203000201021 has 4 divisors (see below), whose sum is σ = 203142459072. Its totient is φ = 202857942972.

The previous prime is 203000200993. The next prime is 203000201051. The reversal of 203000201021 is 120102000302.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-203000201021 is a prime.

It is a super-2 number, since 2×203000201021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203000200993 and 203000201011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203000201051) 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, 71126885 + ... + 71129738.

It is an arithmetic number, because the mean of its divisors is an integer number (50785614768).

Almost surely, 2^203000201021 is an apocalyptic number.

It is an amenable number.

203000201021 is a deficient number, since it is larger than the sum of its proper divisors (142258051).

203000201021 is a wasteful number, since it uses less digits than its factorization.

203000201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142258050.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 203000201021 its reverse (120102000302), we get a palindrome (323102201323).

The spelling of 203000201021 in words is "two hundred three billion, two hundred one thousand, twenty-one".