40124212442421 has 16 divisors (see below), whose sum is σ = 53676888318144. Its totient is φ = 26660562534144.

The previous prime is 40124212442357. The next prime is 40124212442449. The reversal of 40124212442421 is 12424421242104.

It is a happy number.

It is not a de Polignac number, because 40124212442421 - 2⁶ = 40124212442357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40124212441421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4266915 + ... + 9922448.

It is an arithmetic number, because the mean of its divisors is an integer number (3354805519884).

Almost surely, 2^{40124212442421} is an apocalyptic number.

It is an amenable number.

40124212442421 is a deficient number, since it is larger than the sum of its proper divisors (13552675875723).

40124212442421 is a wasteful number, since it uses less digits than its factorization.

40124212442421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14192500.

The product of its (nonzero) digits is 32768, while the sum is 33.

Adding to 40124212442421 its reverse (12424421242104), we get a palindrome (52548633684525).

The spelling of 40124212442421 in words is "forty trillion, one hundred twenty-four billion, two hundred twelve million, four hundred forty-two thousand, four hundred twenty-one".