340213111220 has 24 divisors (see below), whose sum is σ = 715281230664. Its totient is φ = 135926445056.

The previous prime is 340213111213. The next prime is 340213111229. The reversal of 340213111220 is 22111312043.

It can be written as a sum of positive squares in 4 ways, for example, as 183343250596 + 156869860624 = 428186^2 + 396068^2 .

It is a super-2 number, since 2×340213111220² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 340213111192 and 340213111201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340213111229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9907397 + ... + 9941676.

It is an arithmetic number, because the mean of its divisors is an integer number (29803384611).

Almost surely, 2^340213111220 is an apocalyptic number.

It is an amenable number.

340213111220 is an abundant number, since it is smaller than the sum of its proper divisors (375068119444).

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

340213111220 is a wasteful number, since it uses less digits than its factorization.

340213111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19849939 (or 19849937 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 340213111220 its reverse (22111312043), we get a palindrome (362324423263).

The spelling of 340213111220 in words is "three hundred forty billion, two hundred thirteen million, one hundred eleven thousand, two hundred twenty".