83121122265610 has 128 divisors (see below), whose sum is σ = 188736061506048. Its totient is φ = 25889719296000.

The previous prime is 83121122265569. The next prime is 83121122265613. The reversal of 83121122265610 is 1656222112138.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (83121122265613) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22352971 + ... + 25804990.

It is an arithmetic number, because the mean of its divisors is an integer number (1474500480516).

Almost surely, 2^{83121122265610} is an apocalyptic number.

83121122265610 is an abundant number, since it is smaller than the sum of its proper divisors (105614939240438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83121122265610 is a wasteful number, since it uses less digits than its factorization.

83121122265610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48158080.

The product of its (nonzero) digits is 69120, while the sum is 40.

Adding to 83121122265610 its reverse (1656222112138), we get a palindrome (84777344377748).

The spelling of 83121122265610 in words is "eighty-three trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred sixty-five thousand, six hundred ten".