100234155421 has 2 divisors, whose sum is σ = 100234155422. Its totient is φ = 100234155420.

The previous prime is 100234155401. The next prime is 100234155467. The reversal of 100234155421 is 124551432001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99357344100 + 876811321 = 315210^2 + 29611^2 .

It is a cyclic number.

It is not a de Polignac number, because 100234155421 - 2⁷ = 100234155293 is a prime.

It is a super-2 number, since 2×100234155421² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 100234155421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100234155401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50117077710 + 50117077711.

It is an arithmetic number, because the mean of its divisors is an integer number (50117077711).

Almost surely, 2^100234155421 is an apocalyptic number.

It is an amenable number.

100234155421 is a deficient number, since it is larger than the sum of its proper divisors (1).

100234155421 is an equidigital number, since it uses as much as digits as its factorization.

100234155421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 100234155421 its reverse (124551432001), we get a palindrome (224785587422).

The spelling of 100234155421 in words is "one hundred billion, two hundred thirty-four million, one hundred fifty-five thousand, four hundred twenty-one".