21003030201 has 16 divisors (see below), whose sum is σ = 28628409600. Its totient is φ = 13690430208.

The previous prime is 21003030197. The next prime is 21003030211. The reversal of 21003030201 is 10203030012.

It is a happy number.

It is not a de Polignac number, because 21003030201 - 2² = 21003030197 is a prime.

It is a super-2 number, since 2×21003030201² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21003030211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68455 + ... + 216083.

It is an arithmetic number, because the mean of its divisors is an integer number (1789275600).

Almost surely, 2^21003030201 is an apocalyptic number.

It is an amenable number.

21003030201 is a deficient number, since it is larger than the sum of its proper divisors (7625379399).

21003030201 is a wasteful number, since it uses less digits than its factorization.

21003030201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148688.

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 21003030201 its reverse (10203030012), we get a palindrome (31206060213).

The spelling of 21003030201 in words is "twenty-one billion, three million, thirty thousand, two hundred one".