72403106366121 has 4 divisors (see below), whose sum is σ = 96537475154832. Its totient is φ = 48268737577412.

The previous prime is 72403106366057. The next prime is 72403106366131. The reversal of 72403106366121 is 12166360130427.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72403106366121 - 2⁶ = 72403106366057 is a prime.

It is a super-2 number, since 2×72403106366121² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72403106366131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12067184394351 + ... + 12067184394356.

It is an arithmetic number, because the mean of its divisors is an integer number (24134368788708).

Almost surely, 2^{72403106366121} is an apocalyptic number.

It is an amenable number.

72403106366121 is a deficient number, since it is larger than the sum of its proper divisors (24134368788711).

72403106366121 is a wasteful number, since it uses less digits than its factorization.

72403106366121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24134368788710.

The product of its (nonzero) digits is 217728, while the sum is 42.

Adding to 72403106366121 its reverse (12166360130427), we get a palindrome (84569466496548).

The spelling of 72403106366121 in words is "seventy-two trillion, four hundred three billion, one hundred six million, three hundred sixty-six thousand, one hundred twenty-one".