1421242231 has 4 divisors (see below), whose sum is σ = 1424896200. Its totient is φ = 1417588264.

The previous prime is 1421242219. The next prime is 1421242271. The reversal of 1421242231 is 1322421241.

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 1421242231 - 2⁷ = 1421242103 is a prime.

It is a super-2 number, since 2×1421242231² = 4039858958355714722, which 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 (1421242271) 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, 1826401 + ... + 1827178.

It is an arithmetic number, because the mean of its divisors is an integer number (356224050).

Almost surely, 2^1421242231 is an apocalyptic number.

1421242231 is a deficient number, since it is larger than the sum of its proper divisors (3653969).

1421242231 is an equidigital number, since it uses as much as digits as its factorization.

1421242231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3653968.

The product of its digits is 768, while the sum is 22.

The square root of 1421242231 is about 37699.3664535626. The cubic root of 1421242231 is about 1124.3185287786.

Adding to 1421242231 its reverse (1322421241), we get a palindrome (2743663472).

The spelling of 1421242231 in words is "one billion, four hundred twenty-one million, two hundred forty-two thousand, two hundred thirty-one".