1311232421451 has 16 divisors (see below), whose sum is σ = 1781696964096. Its totient is φ = 857468822496.

The previous prime is 1311232421431. The next prime is 1311232421467. The reversal of 1311232421451 is 1541242321131.

It is not a de Polignac number, because 1311232421451 - 2²² = 1311228227147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1311232421431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214285 + ... + 1633518.

It is an arithmetic number, because the mean of its divisors is an integer number (111356060256).

Almost surely, 2^{1311232421451} is an apocalyptic number.

1311232421451 is a deficient number, since it is larger than the sum of its proper divisors (470464542645).

1311232421451 is a wasteful number, since it uses less digits than its factorization.

1311232421451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1852322.

The product of its digits is 5760, while the sum is 30.

Adding to 1311232421451 its reverse (1541242321131), we get a palindrome (2852474742582).

The spelling of 1311232421451 in words is "one trillion, three hundred eleven billion, two hundred thirty-two million, four hundred twenty-one thousand, four hundred fifty-one".