83121143105530 has 32 divisors (see below), whose sum is σ = 152243188530048. Its totient is φ = 32668291320000.

The previous prime is 83121143105339. The next prime is 83121143105549. The reversal of 83121143105530 is 3550134112138.

It is a self number, because there is not a number n which added to its sum of digits gives 83121143105530.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199573596 + ... + 199989655.

It is an arithmetic number, because the mean of its divisors is an integer number (4757599641564).

Almost surely, 2^{83121143105530} is an apocalyptic number.

83121143105530 is a deficient number, since it is larger than the sum of its proper divisors (69122045424518).

83121143105530 is a wasteful number, since it uses less digits than its factorization.

83121143105530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399563622.

The product of its (nonzero) digits is 43200, while the sum is 37.

Adding to 83121143105530 its reverse (3550134112138), we get a palindrome (86671277217668).

The spelling of 83121143105530 in words is "eighty-three trillion, one hundred twenty-one billion, one hundred forty-three million, one hundred five thousand, five hundred thirty".