23121405033506 has 16 divisors (see below), whose sum is σ = 37799961522624. Its totient is φ = 10542846409104.

The previous prime is 23121405033499. The next prime is 23121405033511. The reversal of 23121405033506 is 60533050412132.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5357135246 + ... + 5357139561.

It is an arithmetic number, because the mean of its divisors is an integer number (2362497595164).

Almost surely, 2^{23121405033506} is an apocalyptic number.

23121405033506 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

23121405033506 is a deficient number, since it is larger than the sum of its proper divisors (14678556489118).

23121405033506 is a wasteful number, since it uses less digits than its factorization.

23121405033506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10714274905.

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 23121405033506 its reverse (60533050412132), we get a palindrome (83654455445638).

The spelling of 23121405033506 in words is "twenty-three trillion, one hundred twenty-one billion, four hundred five million, thirty-three thousand, five hundred six".