100240240421 has 2 divisors, whose sum is σ = 100240240422. Its totient is φ = 100240240420.

The previous prime is 100240240411. The next prime is 100240240453. The reversal of 100240240421 is 124042042001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84340291396 + 15899949025 = 290414^2 + 126095^2 .

It is a cyclic number.

It is not a de Polignac number, because 100240240421 - 2²⁶ = 100173131557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100240240393 and 100240240402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100240240411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50120120210 + 50120120211.

It is an arithmetic number, because the mean of its divisors is an integer number (50120120211).

Almost surely, 2^100240240421 is an apocalyptic number.

It is an amenable number.

100240240421 is a deficient number, since it is larger than the sum of its proper divisors (1).

100240240421 is an equidigital number, since it uses as much as digits as its factorization.

100240240421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 100240240421 its reverse (124042042001), we get a palindrome (224282282422).

The spelling of 100240240421 in words is "one hundred billion, two hundred forty million, two hundred forty thousand, four hundred twenty-one".