40221131165421 has 8 divisors (see below), whose sum is σ = 53628999397440. Its totient is φ = 26813675188512.

The previous prime is 40221131165419. The next prime is 40221131165431. The reversal of 40221131165421 is 12456113112204.

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

It is not a de Polignac number, because 40221131165421 - 2¹ = 40221131165419 is a prime.

It is a super-2 number, since 2×40221131165421² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40221131165431) 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, 102836056 + ... + 103226433.

It is an arithmetic number, because the mean of its divisors is an integer number (6703624924680).

Almost surely, 2^{40221131165421} is an apocalyptic number.

It is an amenable number.

40221131165421 is a deficient number, since it is larger than the sum of its proper divisors (13407868232019).

40221131165421 is a wasteful number, since it uses less digits than its factorization.

40221131165421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206127555.

The product of its (nonzero) digits is 11520, while the sum is 33.

Adding to 40221131165421 its reverse (12456113112204), we get a palindrome (52677244277625).

The spelling of 40221131165421 in words is "forty trillion, two hundred twenty-one billion, one hundred thirty-one million, one hundred sixty-five thousand, four hundred twenty-one".