404240121243 has 24 divisors (see below), whose sum is σ = 667552871648. Its totient is φ = 230912716032.

The previous prime is 404240121239. The next prime is 404240121251. The reversal of 404240121243 is 342121042404.

404240121243 is a `hidden beast` number, since 4 + 0 + 4 + 2 + 401 + 212 + 43 = 666.

It is not a de Polignac number, because 404240121243 - 2² = 404240121239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404240121223) 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, 953980 + ... + 1310937.

Almost surely, 2^404240121243 is an apocalyptic number.

404240121243 is a deficient number, since it is larger than the sum of its proper divisors (263312750405).

404240121243 is a wasteful number, since it uses less digits than its factorization.

404240121243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267763 (or 2267760 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 404240121243 its reverse (342121042404), we get a palindrome (746361163647).

The spelling of 404240121243 in words is "four hundred four billion, two hundred forty million, one hundred twenty-one thousand, two hundred forty-three".