1421253111 has 16 divisors (see below), whose sum is σ = 1925224704. Its totient is φ = 932420544.

The previous prime is 1421253109. The next prime is 1421253131. The reversal of 1421253111 is 1113521241.

It is not a de Polignac number, because 1421253111 - 2¹ = 1421253109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421253131) 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 15 ways as a sum of consecutive naturals, for example, 236830 + ... + 242756.

It is an arithmetic number, because the mean of its divisors is an integer number (120326544).

Almost surely, 2^1421253111 is an apocalyptic number.

1421253111 is a deficient number, since it is larger than the sum of its proper divisors (503971593).

1421253111 is a wasteful number, since it uses less digits than its factorization.

1421253111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7190.

The product of its digits is 240, while the sum is 21.

The square root of 1421253111 is about 37699.5107527936. The cubic root of 1421253111 is about 1124.3213977604.

Adding to 1421253111 its reverse (1113521241), we get a palindrome (2534774352).

The spelling of 1421253111 in words is "one billion, four hundred twenty-one million, two hundred fifty-three thousand, one hundred eleven".