21203301001 has 4 divisors (see below), whose sum is σ = 21279847492. Its totient is φ = 21126754512.

The previous prime is 21203300969. The next prime is 21203301011. The reversal of 21203301001 is 10010330212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3044390976 + 18158910025 = 55176^2 + 134755^2 .

It is a cyclic number.

It is not a de Polignac number, because 21203301001 - 2⁵ = 21203300969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21203301011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38272830 + ... + 38273383.

It is an arithmetic number, because the mean of its divisors is an integer number (5319961873).

Almost surely, 2^21203301001 is an apocalyptic number.

It is an amenable number.

21203301001 is a deficient number, since it is larger than the sum of its proper divisors (76546491).

21203301001 is an equidigital number, since it uses as much as digits as its factorization.

21203301001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76546490.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21203301001 its reverse (10010330212), we get a palindrome (31213631213).

The spelling of 21203301001 in words is "twenty-one billion, two hundred three million, three hundred one thousand, one".