1421312421 has 16 divisors (see below), whose sum is σ = 2007414144. Its totient is φ = 891423744.

The previous prime is 1421312407. The next prime is 1421312441. The reversal of 1421312421 is 1242131241.

It is not a de Polignac number, because 1421312421 - 2⁹ = 1421311909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421312401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159736 + ... + 168398.

It is an arithmetic number, because the mean of its divisors is an integer number (125463384).

Almost surely, 2^1421312421 is an apocalyptic number.

It is an amenable number.

1421312421 is a deficient number, since it is larger than the sum of its proper divisors (586101723).

1421312421 is a wasteful number, since it uses less digits than its factorization.

1421312421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11900.

The product of its digits is 384, while the sum is 21.

The square root of 1421312421 is about 37700.2973595700. The cubic root of 1421312421 is about 1124.3370371456.

Adding to 1421312421 its reverse (1242131241), we get a palindrome (2663443662).

The spelling of 1421312421 in words is "one billion, four hundred twenty-one million, three hundred twelve thousand, four hundred twenty-one".