40221213434421 has 4 divisors (see below), whose sum is σ = 53628284579232. Its totient is φ = 26814142289612.

The previous prime is 40221213434299. The next prime is 40221213434509. The reversal of 40221213434421 is 12443431212204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40221213434421 - 2¹⁰ = 40221213433397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40221213436421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6703535572401 + ... + 6703535572406.

It is an arithmetic number, because the mean of its divisors is an integer number (13407071144808).

Almost surely, 2^{40221213434421} is an apocalyptic number.

It is an amenable number.

40221213434421 is a deficient number, since it is larger than the sum of its proper divisors (13407071144811).

40221213434421 is a wasteful number, since it uses less digits than its factorization.

40221213434421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13407071144810.

The product of its (nonzero) digits is 36864, while the sum is 33.

Adding to 40221213434421 its reverse (12443431212204), we get a palindrome (52664644646625).

The spelling of 40221213434421 in words is "forty trillion, two hundred twenty-one billion, two hundred thirteen million, four hundred thirty-four thousand, four hundred twenty-one".