21203103201 has 32 divisors (see below), whose sum is σ = 33663541248. Its totient is φ = 11615598720.

The previous prime is 21203103151. The next prime is 21203103211. The reversal of 21203103201 is 10230130212.

It is not a de Polignac number, because 21203103201 - 2⁹ = 21203102689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21203103211) 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, 82540 + ... + 221853.

It is an arithmetic number, because the mean of its divisors is an integer number (1051985664).

Almost surely, 2^21203103201 is an apocalyptic number.

21203103201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21203103201 is a deficient number, since it is larger than the sum of its proper divisors (12460438047).

21203103201 is a wasteful number, since it uses less digits than its factorization.

21203103201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304541.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21203103201 its reverse (10230130212), we get a palindrome (31433233413).

The spelling of 21203103201 in words is "twenty-one billion, two hundred three million, one hundred three thousand, two hundred one".