40001312421 has 12 divisors (see below), whose sum is σ = 66033912672. Its totient is φ = 22857892776.

The previous prime is 40001312419. The next prime is 40001312423. The reversal of 40001312421 is 12421310004.

It is an interprime number because it is at equal distance from previous prime (40001312419) and next prime (40001312423).

It is not a de Polignac number, because 40001312421 - 2¹ = 40001312419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40001312394 and 40001312403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40001312423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 317470671 + ... + 317470796.

It is an arithmetic number, because the mean of its divisors is an integer number (5502826056).

Almost surely, 2^40001312421 is an apocalyptic number.

It is an amenable number.

40001312421 is a deficient number, since it is larger than the sum of its proper divisors (26032600251).

40001312421 is a wasteful number, since it uses less digits than its factorization.

40001312421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634941480 (or 634941477 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 40001312421 its reverse (12421310004), we get a palindrome (52422622425).

The spelling of 40001312421 in words is "forty billion, one million, three hundred twelve thousand, four hundred twenty-one".