220310122172 has 96 divisors (see below), whose sum is σ = 484257177600. Its totient is φ = 85510510272.

The previous prime is 220310122171. The next prime is 220310122177. The reversal of 220310122172 is 271221013022.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220310122171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26658113 + ... + 26666375.

It is an arithmetic number, because the mean of its divisors is an integer number (5044345600).

Almost surely, 2^220310122172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220310122172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242128588800).

220310122172 is an abundant number, since it is smaller than the sum of its proper divisors (263947055428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220310122172 is a wasteful number, since it uses less digits than its factorization.

220310122172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10495 (or 10493 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 220310122172 its reverse (271221013022), we get a palindrome (491531135194).

The spelling of 220310122172 in words is "two hundred twenty billion, three hundred ten million, one hundred twenty-two thousand, one hundred seventy-two".