21001203132201 has 24 divisors (see below), whose sum is σ = 30443222016480. Its totient is φ = 13950889445376.

The previous prime is 21001203132167. The next prime is 21001203132241. The reversal of 21001203132201 is 10223130210012.

21001203132201 is a `hidden beast` number, since 2 + 10 + 0 + 120 + 313 + 220 + 1 = 666.

It is not a de Polignac number, because 21001203132201 - 2¹⁰ = 21001203131177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21001203132241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94074025 + ... + 94297001.

It is an arithmetic number, because the mean of its divisors is an integer number (1268467584020).

Almost surely, 2^{21001203132201} is an apocalyptic number.

It is an amenable number.

21001203132201 is a deficient number, since it is larger than the sum of its proper divisors (9442018884279).

21001203132201 is a wasteful number, since it uses less digits than its factorization.

21001203132201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260245 (or 260242 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21001203132201 its reverse (10223130210012), we get a palindrome (31224333342213).

The spelling of 21001203132201 in words is "twenty-one trillion, one billion, two hundred three million, one hundred thirty-two thousand, two hundred one".