1421005111 has 4 divisors (see below), whose sum is σ = 1424287312. Its totient is φ = 1417722912.

The previous prime is 1421005081. The next prime is 1421005139. The reversal of 1421005111 is 1115001241.

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 1421005111 - 2¹¹ = 1421003063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421005141) 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, 1640451 + ... + 1641316.

It is an arithmetic number, because the mean of its divisors is an integer number (356071828).

Almost surely, 2^1421005111 is an apocalyptic number.

1421005111 is a deficient number, since it is larger than the sum of its proper divisors (3282201).

1421005111 is an equidigital number, since it uses as much as digits as its factorization.

1421005111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3282200.

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 1421005111 is about 37696.2214419430. The cubic root of 1421005111 is about 1124.2559982140.

Adding to 1421005111 its reverse (1115001241), we get a palindrome (2536006352).

The spelling of 1421005111 in words is "one billion, four hundred twenty-one million, five thousand, one hundred eleven".