201030423021 has 64 divisors (see below), whose sum is σ = 308481638400. Its totient is φ = 129310084800.

The previous prime is 201030423019. The next prime is 201030423047. The reversal of 201030423021 is 120324030102.

It is not a de Polignac number, because 201030423021 - 2¹ = 201030423019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201030422985 and 201030423003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201030425021) 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, 94335126 + ... + 94337256.

It is an arithmetic number, because the mean of its divisors is an integer number (4820025600).

Almost surely, 2^201030423021 is an apocalyptic number.

It is an amenable number.

201030423021 is a deficient number, since it is larger than the sum of its proper divisors (107451215379).

201030423021 is a wasteful number, since it uses less digits than its factorization.

201030423021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3207 (or 3201 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 201030423021 its reverse (120324030102), we get a palindrome (321354453123).

The spelling of 201030423021 in words is "two hundred one billion, thirty million, four hundred twenty-three thousand, twenty-one".