1421331111 has 8 divisors (see below), whose sum is σ = 2105675760. Its totient is φ = 947554056.

The previous prime is 1421331077. The next prime is 1421331113. The reversal of 1421331111 is 1111331241.

It is a happy number.

It is not a de Polignac number, because 1421331111 - 2¹³ = 1421322919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421331113) 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, 26320920 + ... + 26320973.

It is an arithmetic number, because the mean of its divisors is an integer number (263209470).

Almost surely, 2^1421331111 is an apocalyptic number.

1421331111 is a deficient number, since it is larger than the sum of its proper divisors (684344649).

1421331111 is an equidigital number, since it uses as much as digits as its factorization.

1421331111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52641902 (or 52641896 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 1421331111 is about 37700.5452347841. The cubic root of 1421331111 is about 1124.3419653999.

Adding to 1421331111 its reverse (1111331241), we get a palindrome (2532662352).

The spelling of 1421331111 in words is "one billion, four hundred twenty-one million, three hundred thirty-one thousand, one hundred eleven".