1421443011 has 4 divisors (see below), whose sum is σ = 1895257352. Its totient is φ = 947628672.

The previous prime is 1421443007. The next prime is 1421443013. The reversal of 1421443011 is 1103441241.

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

It is not a de Polignac number, because 1421443011 - 2² = 1421443007 is a prime.

It is a super-2 number, since 2×1421443011² = 4041000467041492242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421443013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236907166 + ... + 236907171.

It is an arithmetic number, because the mean of its divisors is an integer number (473814338).

Almost surely, 2^1421443011 is an apocalyptic number.

1421443011 is a deficient number, since it is larger than the sum of its proper divisors (473814341).

1421443011 is an equidigital number, since it uses as much as digits as its factorization.

1421443011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473814340.

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

The square root of 1421443011 is about 37702.0292689929. The cubic root of 1421443011 is about 1124.3714707379.

Adding to 1421443011 its reverse (1103441241), we get a palindrome (2524884252).

The spelling of 1421443011 in words is "one billion, four hundred twenty-one million, four hundred forty-three thousand, eleven".