11451213122503 has 16 divisors (see below), whose sum is σ = 14277188044800. Its totient is φ = 8922803896800.

The previous prime is 11451213122423. The next prime is 11451213122513. The reversal of 11451213122503 is 30522131215411.

It is a cyclic number.

It is not a de Polignac number, because 11451213122503 - 2⁹ = 11451213121991 is a prime.

It is a super-2 number, since 2×11451213122503² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11451213122513) 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, 1361418 + ... + 4975528.

It is an arithmetic number, because the mean of its divisors is an integer number (892324252800).

Almost surely, 2^{11451213122503} is an apocalyptic number.

11451213122503 is a deficient number, since it is larger than the sum of its proper divisors (2825974922297).

11451213122503 is a wasteful number, since it uses less digits than its factorization.

11451213122503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3655278.

The product of its (nonzero) digits is 7200, while the sum is 31.

Adding to 11451213122503 its reverse (30522131215411), we get a palindrome (41973344337914).

It can be divided in two parts, 1145121 and 3122503, that added together give a palindrome (4267624).

The spelling of 11451213122503 in words is "eleven trillion, four hundred fifty-one billion, two hundred thirteen million, one hundred twenty-two thousand, five hundred three".