20110313221 has 4 divisors (see below), whose sum is σ = 20268662272. Its totient is φ = 19951964172.

The previous prime is 20110313213. The next prime is 20110313261. The reversal of 20110313221 is 12231301102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12231301102 = 2 ⋅6115650551.

It is a cyclic number.

It is not a de Polignac number, because 20110313221 - 2³ = 20110313213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20110313195 and 20110313204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110313261) 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, 79174335 + ... + 79174588.

It is an arithmetic number, because the mean of its divisors is an integer number (5067165568).

Almost surely, 2^20110313221 is an apocalyptic number.

It is an amenable number.

20110313221 is a deficient number, since it is larger than the sum of its proper divisors (158349051).

20110313221 is a wasteful number, since it uses less digits than its factorization.

20110313221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158349050.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20110313221 its reverse (12231301102), we get a palindrome (32341614323).

The spelling of 20110313221 in words is "twenty billion, one hundred ten million, three hundred thirteen thousand, two hundred twenty-one".