123354521061 has 4 divisors (see below), whose sum is σ = 164472694752. Its totient is φ = 82236347372.

The previous prime is 123354521057. The next prime is 123354521107. The reversal of 123354521061 is 160125453321.

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 123354521061 - 2² = 123354521057 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123354521861) 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, 20559086841 + ... + 20559086846.

It is an arithmetic number, because the mean of its divisors is an integer number (41118173688).

Almost surely, 2^123354521061 is an apocalyptic number.

It is an amenable number.

123354521061 is a deficient number, since it is larger than the sum of its proper divisors (41118173691).

123354521061 is an equidigital number, since it uses as much as digits as its factorization.

123354521061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41118173690.

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 123354521061 its reverse (160125453321), we get a palindrome (283479974382).

The spelling of 123354521061 in words is "one hundred twenty-three billion, three hundred fifty-four million, five hundred twenty-one thousand, sixty-one".