1421130224021 has 4 divisors (see below), whose sum is σ = 1455791936844. Its totient is φ = 1386468511200.

The previous prime is 1421130224011. The next prime is 1421130224081. The reversal of 1421130224021 is 1204220311241.

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

It can be written as a sum of positive squares in 2 ways, for example, as 458349310225 + 962780913796 = 677015^2 + 981214^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421130224021 - 2⁶ = 1421130223957 is a prime.

It is a super-2 number, since 2×1421130224021² (a number of 25 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 (1421130224011) 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, 17330856350 + ... + 17330856431.

It is an arithmetic number, because the mean of its divisors is an integer number (363947984211).

Almost surely, 2^{1421130224021} is an apocalyptic number.

It is an amenable number.

1421130224021 is a deficient number, since it is larger than the sum of its proper divisors (34661712823).

1421130224021 is an equidigital number, since it uses as much as digits as its factorization.

1421130224021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34661712822.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 1421130224021 its reverse (1204220311241), we get a palindrome (2625350535262).

The spelling of 1421130224021 in words is "one trillion, four hundred twenty-one billion, one hundred thirty million, two hundred twenty-four thousand, twenty-one".