20315220233211 has 16 divisors (see below), whose sum is σ = 30910044800800. Its totient is φ = 13177440150624.

The previous prime is 20315220233201. The next prime is 20315220233237. The reversal of 20315220233211 is 11233202251302.

20315220233211 is a `hidden beast` number, since 2 + 0 + 315 + 2 + 2 + 0 + 2 + 332 + 11 = 666.

It is not a de Polignac number, because 20315220233211 - 2³⁴ = 20298040364027 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20315220233201) 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, 10167776896 + ... + 10167778893.

It is an arithmetic number, because the mean of its divisors is an integer number (1931877800050).

Almost surely, 2^{20315220233211} is an apocalyptic number.

20315220233211 is a deficient number, since it is larger than the sum of its proper divisors (10594824567589).

20315220233211 is a wasteful number, since it uses less digits than its factorization.

20315220233211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20335555835 (or 20335555829 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 20315220233211 its reverse (11233202251302), we get a palindrome (31548422484513).

The spelling of 20315220233211 in words is "twenty trillion, three hundred fifteen billion, two hundred twenty million, two hundred thirty-three thousand, two hundred eleven".