100234152421 has 24 divisors (see below), whose sum is σ = 119479653720. Its totient is φ = 83295015936.

The previous prime is 100234152379. The next prime is 100234152617. The reversal of 100234152421 is 124251432001.

It can be written as a sum of positive squares in 4 ways, for example, as 5501930625 + 94732221796 = 74175^2 + 307786^2 .

It is not a de Polignac number, because 100234152421 - 2²⁵ = 100200597989 is a prime.

It is a super-2 number, since 2×100234152421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100234155421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 311776 + ... + 545593.

It is an arithmetic number, because the mean of its divisors is an integer number (4978318905).

Almost surely, 2^100234152421 is an apocalyptic number.

It is an amenable number.

100234152421 is a deficient number, since it is larger than the sum of its proper divisors (19245501299).

100234152421 is a wasteful number, since it uses less digits than its factorization.

100234152421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857445 (or 857422 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 100234152421 its reverse (124251432001), we get a palindrome (224485584422).

The spelling of 100234152421 in words is "one hundred billion, two hundred thirty-four million, one hundred fifty-two thousand, four hundred twenty-one".