40421132121 has 16 divisors (see below), whose sum is σ = 56325620736. Its totient is φ = 25735679376.

The previous prime is 40421132107. The next prime is 40421132131. The reversal of 40421132121 is 12123112404.

It is not a de Polignac number, because 40421132121 - 2²¹ = 40419034969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40421132131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 411165 + ... + 499898.

It is an arithmetic number, because the mean of its divisors is an integer number (3520351296).

Almost surely, 2^40421132121 is an apocalyptic number.

It is an amenable number.

40421132121 is a deficient number, since it is larger than the sum of its proper divisors (15904488615).

40421132121 is a wasteful number, since it uses less digits than its factorization.

40421132121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911732.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 40421132121 its reverse (12123112404), we get a palindrome (52544244525).

The spelling of 40421132121 in words is "forty billion, four hundred twenty-one million, one hundred thirty-two thousand, one hundred twenty-one".