40242103421 has 16 divisors (see below), whose sum is σ = 43437886128. Its totient is φ = 37060761600.

The previous prime is 40242103351. The next prime is 40242103457. The reversal of 40242103421 is 12430124204.

It can be written as a sum of positive squares in 8 ways, for example, as 5196391396 + 35045712025 = 72086^2 + 187205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40242103421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40242103471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13231661 + ... + 13234701.

It is an arithmetic number, because the mean of its divisors is an integer number (2714867883).

Almost surely, 2^40242103421 is an apocalyptic number.

It is an amenable number.

40242103421 is a deficient number, since it is larger than the sum of its proper divisors (3195782707).

40242103421 is a wasteful number, since it uses less digits than its factorization.

40242103421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5072.

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

Adding to 40242103421 its reverse (12430124204), we get a palindrome (52672227625).

The spelling of 40242103421 in words is "forty billion, two hundred forty-two million, one hundred three thousand, four hundred twenty-one".