221010124340 has 24 divisors (see below), whose sum is σ = 464131340232. Its totient is φ = 88402129920.

The previous prime is 221010124327. The next prime is 221010124411. The reversal of 221010124340 is 43421010122.

It can be written as a sum of positive squares in 4 ways, for example, as 60399943696 + 160610180644 = 245764^2 + 400762^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1153820 + ... + 1331660.

It is an arithmetic number, because the mean of its divisors is an integer number (19338805843).

Almost surely, 2^221010124340 is an apocalyptic number.

221010124340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221010124340 is an abundant number, since it is smaller than the sum of its proper divisors (243121215892).

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

221010124340 is a wasteful number, since it uses less digits than its factorization.

221010124340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239987 (or 239985 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 221010124340 its reverse (43421010122), we get a palindrome (264431134462).

The spelling of 221010124340 in words is "two hundred twenty-one billion, ten million, one hundred twenty-four thousand, three hundred forty".