123411234521 has 4 divisors (see below), whose sum is σ = 123421005312. Its totient is φ = 123401463732.

The previous prime is 123411234493. The next prime is 123411234553. The reversal of 123411234521 is 125432114321.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 125432114321 = 93287 ⋅1344583.

It is a cyclic number.

It is not a de Polignac number, because 123411234521 - 2¹⁴ = 123411218137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123411234571) 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, 4866425 + ... + 4891718.

It is an arithmetic number, because the mean of its divisors is an integer number (30855251328).

Almost surely, 2^123411234521 is an apocalyptic number.

It is an amenable number.

123411234521 is a deficient number, since it is larger than the sum of its proper divisors (9770791).

123411234521 is an equidigital number, since it uses as much as digits as its factorization.

123411234521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9770790.

The product of its digits is 5760, while the sum is 29.

Adding to 123411234521 its reverse (125432114321), we get a palindrome (248843348842).

The spelling of 123411234521 in words is "one hundred twenty-three billion, four hundred eleven million, two hundred thirty-four thousand, five hundred twenty-one".