100421042131 has 4 divisors (see below), whose sum is σ = 100423246000. Its totient is φ = 100418838264.

The previous prime is 100421042129. The next prime is 100421042143. The reversal of 100421042131 is 131240124001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100421042131 - 2¹ = 100421042129 is a prime.

It is a super-2 number, since 2×100421042131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100421042099 and 100421042108.

It is not an unprimeable number, because it can be changed into a prime (100421042231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1032111 + ... + 1125208.

It is an arithmetic number, because the mean of its divisors is an integer number (25105811500).

Almost surely, 2^100421042131 is an apocalyptic number.

100421042131 is a deficient number, since it is larger than the sum of its proper divisors (2203869).

100421042131 is an equidigital number, since it uses as much as digits as its factorization.

100421042131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203868.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 100421042131 its reverse (131240124001), we get a palindrome (231661166132).

The spelling of 100421042131 in words is "one hundred billion, four hundred twenty-one million, forty-two thousand, one hundred thirty-one".