1223041515451 has 4 divisors (see below), whose sum is σ = 1397761731952. Its totient is φ = 1048321298952.

The previous prime is 1223041515439. The next prime is 1223041515467. The reversal of 1223041515451 is 1545151403221.

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 1223041515451 - 2⁵ = 1223041515419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223041515481) 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, 87360108240 + ... + 87360108253.

It is an arithmetic number, because the mean of its divisors is an integer number (349440432988).

Almost surely, 2^{1223041515451} is an apocalyptic number.

1223041515451 is a deficient number, since it is larger than the sum of its proper divisors (174720216501).

1223041515451 is an equidigital number, since it uses as much as digits as its factorization.

1223041515451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174720216500.

The product of its (nonzero) digits is 24000, while the sum is 34.

Adding to 1223041515451 its reverse (1545151403221), we get a palindrome (2768192918672).

The spelling of 1223041515451 in words is "one trillion, two hundred twenty-three billion, forty-one million, five hundred fifteen thousand, four hundred fifty-one".