123530025311221 has 4 divisors (see below), whose sum is σ = 125373757032352. Its totient is φ = 121686293590092.

The previous prime is 123530025311207. The next prime is 123530025311257. The reversal of 123530025311221 is 122113520035321.

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.

It is a cyclic number.

It is not a de Polignac number, because 123530025311221 - 2¹³ = 123530025303029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123530025311321) 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, 921865860465 + ... + 921865860598.

It is an arithmetic number, because the mean of its divisors is an integer number (31343439258088).

Almost surely, 2^{123530025311221} is an apocalyptic number.

It is an amenable number.

123530025311221 is a deficient number, since it is larger than the sum of its proper divisors (1843731721131).

123530025311221 is an equidigital number, since it uses as much as digits as its factorization.

123530025311221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1843731721130.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 123530025311221 its reverse (122113520035321), we get a palindrome (245643545346542).

The spelling of 123530025311221 in words is "one hundred twenty-three trillion, five hundred thirty billion, twenty-five million, three hundred eleven thousand, two hundred twenty-one".