1421312111 has 4 divisors (see below), whose sum is σ = 1437282000. Its totient is φ = 1405342224.

The previous prime is 1421312063. The next prime is 1421312143. The reversal of 1421312111 is 1112131241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1112131241 = 13 ⋅85548557.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421312111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1421312111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421312161) 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, 7984811 + ... + 7984988.

It is an arithmetic number, because the mean of its divisors is an integer number (359320500).

Almost surely, 2^1421312111 is an apocalyptic number.

1421312111 is a deficient number, since it is larger than the sum of its proper divisors (15969889).

1421312111 is an equidigital number, since it uses as much as digits as its factorization.

1421312111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15969888.

The product of its digits is 48, while the sum is 17.

The square root of 1421312111 is about 37700.2932481964. The cubic root of 1421312111 is about 1124.3369554032.

Adding to 1421312111 its reverse (1112131241), we get a palindrome (2533443352).

The spelling of 1421312111 in words is "one billion, four hundred twenty-one million, three hundred twelve thousand, one hundred eleven".