10131420421 has 4 divisors (see below), whose sum is σ = 10131636172. Its totient is φ = 10131204672.

The previous prime is 10131420389. The next prime is 10131420427. The reversal of 10131420421 is 12402413101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12402413101 = 13 ⋅954031777.

It can be written as a sum of positive squares in 2 ways, for example, as 4014616321 + 6116804100 = 63361^2 + 78210^2 .

It is a cyclic number.

It is not a de Polignac number, because 10131420421 - 2⁵ = 10131420389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10131420427) 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, 4266 + ... + 142411.

It is an arithmetic number, because the mean of its divisors is an integer number (2532909043).

Almost surely, 2^10131420421 is an apocalyptic number.

It is an amenable number.

10131420421 is a deficient number, since it is larger than the sum of its proper divisors (215751).

10131420421 is an equidigital number, since it uses as much as digits as its factorization.

10131420421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215750.

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

Adding to 10131420421 its reverse (12402413101), we get a palindrome (22533833522).

The spelling of 10131420421 in words is "ten billion, one hundred thirty-one million, four hundred twenty thousand, four hundred twenty-one".