40121621257401 has 24 divisors (see below), whose sum is σ = 58991898420000. Its totient is φ = 26269329333312.

The previous prime is 40121621257349. The next prime is 40121621257409. The reversal of 40121621257401 is 10475212612104.

40121621257401 is a `hidden beast` number, since 4 + 0 + 1 + 2 + 1 + 621 + 25 + 7 + 4 + 0 + 1 = 666.

It is not a de Polignac number, because 40121621257401 - 2⁶ = 40121621257337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40121621257409) 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, 35457571 + ... + 36571608.

It is an arithmetic number, because the mean of its divisors is an integer number (2457995767500).

Almost surely, 2^{40121621257401} is an apocalyptic number.

It is an amenable number.

40121621257401 is a deficient number, since it is larger than the sum of its proper divisors (18870277162599).

40121621257401 is a wasteful number, since it uses less digits than its factorization.

40121621257401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72030293 (or 72030290 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

Adding to 40121621257401 its reverse (10475212612104), we get a palindrome (50596833869505).

The spelling of 40121621257401 in words is "forty trillion, one hundred twenty-one billion, six hundred twenty-one million, two hundred fifty-seven thousand, four hundred one".