10421132021 has 2 divisors, whose sum is σ = 10421132022. Its totient is φ = 10421132020.

The previous prime is 10421131979. The next prime is 10421132041. The reversal of 10421132021 is 12023112401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9687480625 + 733651396 = 98425^2 + 27086^2 .

It is a cyclic number.

It is not a de Polignac number, because 10421132021 - 2¹⁴ = 10421115637 is a prime.

It is a super-2 number, since 2×10421132021² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10421132041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5210566010 + 5210566011.

It is an arithmetic number, because the mean of its divisors is an integer number (5210566011).

Almost surely, 2^10421132021 is an apocalyptic number.

It is an amenable number.

10421132021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10421132021 is an equidigital number, since it uses as much as digits as its factorization.

10421132021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 10421132021 its reverse (12023112401), we get a palindrome (22444244422).

The spelling of 10421132021 in words is "ten billion, four hundred twenty-one million, one hundred thirty-two thousand, twenty-one".