21321102201 has 8 divisors (see below), whose sum is σ = 32489298624. Its totient is φ = 12183486960.

The previous prime is 21321102193. The next prime is 21321102217. The reversal of 21321102201 is 10220112312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21321102201 - 2³ = 21321102193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21321102401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507645270 + ... + 507645311.

It is an arithmetic number, because the mean of its divisors is an integer number (4061162328).

Almost surely, 2^21321102201 is an apocalyptic number.

21321102201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21321102201 is a deficient number, since it is larger than the sum of its proper divisors (11168196423).

21321102201 is a wasteful number, since it uses less digits than its factorization.

21321102201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015290591.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21321102201 its reverse (10220112312), we get a palindrome (31541214513).

The spelling of 21321102201 in words is "twenty-one billion, three hundred twenty-one million, one hundred two thousand, two hundred one".