2221402423124 has 72 divisors (see below), whose sum is σ = 4359398256360. Its totient is φ = 985844600832.

The previous prime is 2221402423117. The next prime is 2221402423129. The reversal of 2221402423124 is 4213242041222.

It can be written as a sum of positive squares in 4 ways, for example, as 825535788100 + 1395866635024 = 908590^2 + 1181468^2 .

It is a super-2 number, since 2×2221402423124² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221402423129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3341612 + ... + 3950844.

It is an arithmetic number, because the mean of its divisors is an integer number (60547198005).

Almost surely, 2^{2221402423124} is an apocalyptic number.

It is an amenable number.

2221402423124 is a deficient number, since it is larger than the sum of its proper divisors (2137995833236).

2221402423124 is a wasteful number, since it uses less digits than its factorization.

2221402423124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609369 (or 609324 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 2221402423124 its reverse (4213242041222), we get a palindrome (6434644464346).

The spelling of 2221402423124 in words is "two trillion, two hundred twenty-one billion, four hundred two million, four hundred twenty-three thousand, one hundred twenty-four".