20315221201 has 16 divisors (see below), whose sum is σ = 23923071360. Its totient is φ = 17056251520.

The previous prime is 20315221189. The next prime is 20315221207. The reversal of 20315221201 is 10212251302.

It is not a de Polignac number, because 20315221201 - 2⁵ = 20315221169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20315221207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1377100 + ... + 1391773.

It is an arithmetic number, because the mean of its divisors is an integer number (1495191960).

Almost surely, 2^20315221201 is an apocalyptic number.

It is an amenable number.

20315221201 is a deficient number, since it is larger than the sum of its proper divisors (3607850159).

20315221201 is a wasteful number, since it uses less digits than its factorization.

20315221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2768936.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 20315221201 its reverse (10212251302), we get a palindrome (30527472503).

The spelling of 20315221201 in words is "twenty billion, three hundred fifteen million, two hundred twenty-one thousand, two hundred one".