405531021124 has 12 divisors (see below), whose sum is σ = 709695115024. Its totient is φ = 202760988264.

The previous prime is 405531021041. The next prime is 405531021131. The reversal of 405531021124 is 421120135504.

It is a junction number, because it is equal to n+sod(n) for n = 405531021092 and 405531021101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 924642 + ... + 1290745.

Almost surely, 2^405531021124 is an apocalyptic number.

It is an amenable number.

405531021124 is a deficient number, since it is larger than the sum of its proper divisors (304164093900).

405531021124 is a wasteful number, since it uses less digits than its factorization.

405531021124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2261154 (or 2261152 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 405531021124 its reverse (421120135504), we get a palindrome (826651156628).

The spelling of 405531021124 in words is "four hundred five billion, five hundred thirty-one million, twenty-one thousand, one hundred twenty-four".