123451154321 has 4 divisors (see below), whose sum is σ = 134673986544. Its totient is φ = 112228322100.

The previous prime is 123451154317. The next prime is 123451154327.

123451154321 is nontrivially palindromic in base 10.

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 123451154321 - 2² = 123451154317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123451154327) 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, 5611416095 + ... + 5611416116.

It is an arithmetic number, because the mean of its divisors is an integer number (33668496636).

Almost surely, 2^123451154321 is an apocalyptic number.

123451154321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123451154321 is a deficient number, since it is larger than the sum of its proper divisors (11222832223).

123451154321 is a wasteful number, since it uses less digits than its factorization.

123451154321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11222832222.

The product of its digits is 14400, while the sum is 32.

It can be divided in two parts, 123451 and 154321, that added together give a palindrome (277772).

The spelling of 123451154321 in words is "one hundred twenty-three billion, four hundred fifty-one million, one hundred fifty-four thousand, three hundred twenty-one".