402144321123 has 24 divisors (see below), whose sum is σ = 606199045920. Its totient is φ = 256410887040.

The previous prime is 402144321121. The next prime is 402144321217. The reversal of 402144321123 is 321123441204.

402144321123 is a `hidden beast` number, since 4 + 0 + 2 + 1 + 443 + 211 + 2 + 3 = 666.

It is not a de Polignac number, because 402144321123 - 2¹ = 402144321121 is a prime.

It is a super-2 number, since 2×402144321123² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (402144321121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1807773 + ... + 2018001.

It is an arithmetic number, because the mean of its divisors is an integer number (25258293580).

Almost surely, 2^402144321123 is an apocalyptic number.

402144321123 is a deficient number, since it is larger than the sum of its proper divisors (204054724797).

402144321123 is a wasteful number, since it uses less digits than its factorization.

402144321123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219499 (or 219496 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 402144321123 its reverse (321123441204), we get a palindrome (723267762327).

The spelling of 402144321123 in words is "four hundred two billion, one hundred forty-four million, three hundred twenty-one thousand, one hundred twenty-three".