83121558883111 has 4 divisors (see below), whose sum is σ = 94996067294992. Its totient is φ = 71247050471232.

The previous prime is 83121558883109. The next prime is 83121558883157. The reversal of 83121558883111 is 11138885512138.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83121558883111 - 2¹ = 83121558883109 is a prime.

It is a super-2 number, since 2×83121558883111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83121558883511) 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, 5937254205930 + ... + 5937254205943.

It is an arithmetic number, because the mean of its divisors is an integer number (23749016823748).

Almost surely, 2^{83121558883111} is an apocalyptic number.

83121558883111 is a deficient number, since it is larger than the sum of its proper divisors (11874508411881).

83121558883111 is a wasteful number, since it uses less digits than its factorization.

83121558883111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11874508411880.

The product of its digits is 1843200, while the sum is 55.

The spelling of 83121558883111 in words is "eighty-three trillion, one hundred twenty-one billion, five hundred fifty-eight million, eight hundred eighty-three thousand, one hundred eleven".