40121223421 has 8 divisors (see below), whose sum is σ = 40302568800. Its totient is φ = 39939931920.

The previous prime is 40121223419. The next prime is 40121223431. The reversal of 40121223421 is 12432212104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40121223421 - 2¹ = 40121223419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40121223392 and 40121223401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40121223431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2644026 + ... + 2659156.

It is an arithmetic number, because the mean of its divisors is an integer number (5037821100).

Almost surely, 2^40121223421 is an apocalyptic number.

It is an amenable number.

40121223421 is a deficient number, since it is larger than the sum of its proper divisors (181345379).

40121223421 is a wasteful number, since it uses less digits than its factorization.

40121223421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26939.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 40121223421 its reverse (12432212104), we get a palindrome (52553435525).

The spelling of 40121223421 in words is "forty billion, one hundred twenty-one million, two hundred twenty-three thousand, four hundred twenty-one".