40234021421 has 32 divisors (see below), whose sum is σ = 45731952000. Its totient is φ = 35062030080.

The previous prime is 40234021409. The next prime is 40234021433. The reversal of 40234021421 is 12412043204.

It is an interprime number because it is at equal distance from previous prime (40234021409) and next prime (40234021433).

It is not a de Polignac number, because 40234021421 - 2²² = 40229827117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40234021481) 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 31 ways as a sum of consecutive naturals, for example, 31506035 + ... + 31507311.

It is an arithmetic number, because the mean of its divisors is an integer number (1429123500).

Almost surely, 2^40234021421 is an apocalyptic number.

It is an amenable number.

40234021421 is a deficient number, since it is larger than the sum of its proper divisors (5497930579).

40234021421 is a wasteful number, since it uses less digits than its factorization.

40234021421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1949.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 40234021421 its reverse (12412043204), we get a palindrome (52646064625).

The spelling of 40234021421 in words is "forty billion, two hundred thirty-four million, twenty-one thousand, four hundred twenty-one".