21004041201 has 32 divisors (see below), whose sum is σ = 32922989568. Its totient is φ = 11742815040.

The previous prime is 21004041199. The next prime is 21004041203. The reversal of 21004041201 is 10214040012.

It is an interprime number because it is at equal distance from previous prime (21004041199) and next prime (21004041203).

It is not a de Polignac number, because 21004041201 - 2¹ = 21004041199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21004041203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 674170 + ... + 704636.

It is an arithmetic number, because the mean of its divisors is an integer number (1028843424).

Almost surely, 2^21004041201 is an apocalyptic number.

It is an amenable number.

21004041201 is a deficient number, since it is larger than the sum of its proper divisors (11918948367).

21004041201 is a wasteful number, since it uses less digits than its factorization.

21004041201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32101.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21004041201 its reverse (10214040012), we get a palindrome (31218081213).

The spelling of 21004041201 in words is "twenty-one billion, four million, forty-one thousand, two hundred one".