1421113231 has 4 divisors (see below), whose sum is σ = 1422630832. Its totient is φ = 1419595632.

The previous prime is 1421113163. The next prime is 1421113237. The reversal of 1421113231 is 1323111241.

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

It is a cyclic number.

It is not a de Polignac number, because 1421113231 - 2¹³ = 1421105039 is a prime.

It is a super-2 number, since 2×1421113231² = 4039125630646518722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1421113199 and 1421113208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421113237) 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, 757395 + ... + 759268.

It is an arithmetic number, because the mean of its divisors is an integer number (355657708).

Almost surely, 2^1421113231 is an apocalyptic number.

1421113231 is a deficient number, since it is larger than the sum of its proper divisors (1517601).

1421113231 is an equidigital number, since it uses as much as digits as its factorization.

1421113231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517600.

The product of its digits is 144, while the sum is 19.

The square root of 1421113231 is about 37697.6555106548. The cubic root of 1421113231 is about 1124.2845112421.

Adding to 1421113231 its reverse (1323111241), we get a palindrome (2744224472).

The spelling of 1421113231 in words is "one billion, four hundred twenty-one million, one hundred thirteen thousand, two hundred thirty-one".