1431121421 has 8 divisors (see below), whose sum is σ = 1526874624. Its totient is φ = 1336653760.

The previous prime is 1431121403. The next prime is 1431121457. The reversal of 1431121421 is 1241211341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1431121421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1431121393 and 1431121402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431121481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319085 + ... + 323538.

It is an arithmetic number, because the mean of its divisors is an integer number (190859328).

Almost surely, 2^1431121421 is an apocalyptic number.

It is an amenable number.

1431121421 is a deficient number, since it is larger than the sum of its proper divisors (95753203).

1431121421 is a wasteful number, since it uses less digits than its factorization.

1431121421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642771.

The product of its digits is 192, while the sum is 20.

The square root of 1431121421 is about 37830.1654899896. The cubic root of 1431121421 is about 1126.9175976202.

Adding to 1431121421 its reverse (1241211341), we get a palindrome (2672332762).

The spelling of 1431121421 in words is "one billion, four hundred thirty-one million, one hundred twenty-one thousand, four hundred twenty-one".