201033020421 has 30 divisors (see below), whose sum is σ = 306082041650. Its totient is φ = 131493147552.

The previous prime is 201033020399. The next prime is 201033020423. The reversal of 201033020421 is 124020330102.

It can be written as a sum of positive squares in 3 ways, for example, as 75795596100 + 125237424321 = 275310^2 + 353889^2 .

It is not a de Polignac number, because 201033020421 - 2¹⁷ = 201032889349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201033020394 and 201033020403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201033020423) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 214246 + ... + 669303.

Almost surely, 2^201033020421 is an apocalyptic number.

It is an amenable number.

201033020421 is a deficient number, since it is larger than the sum of its proper divisors (105049021229).

201033020421 is an frugal number, since it uses more digits than its factorization.

201033020421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883667 (or 883605 counting only the distinct ones).

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

Adding to 201033020421 its reverse (124020330102), we get a palindrome (325053350523).

The spelling of 201033020421 in words is "two hundred one billion, thirty-three million, twenty thousand, four hundred twenty-one".