21325031201 has 4 divisors (see below), whose sum is σ = 21328182804. Its totient is φ = 21321879600.

The previous prime is 21325031179. The next prime is 21325031209. The reversal of 21325031201 is 10213052312.

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 12787086400 + 8537944801 = 113080^2 + 92401^2 .

It is a cyclic number.

It is not a de Polignac number, because 21325031201 - 2¹⁸ = 21324769057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21325031209) 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, 1565630 + ... + 1579191.

It is an arithmetic number, because the mean of its divisors is an integer number (5332045701).

Almost surely, 2^21325031201 is an apocalyptic number.

It is an amenable number.

21325031201 is a deficient number, since it is larger than the sum of its proper divisors (3151603).

21325031201 is an equidigital number, since it uses as much as digits as its factorization.

21325031201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3151602.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 21325031201 its reverse (10213052312), we get a palindrome (31538083513).

The spelling of 21325031201 in words is "twenty-one billion, three hundred twenty-five million, thirty-one thousand, two hundred one".