68981122211 has 4 divisors (see below), whose sum is σ = 68981667072. Its totient is φ = 68980577352.

The previous prime is 68981122193. The next prime is 68981122229. The reversal of 68981122211 is 11222118986.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (68981122193) and next prime (68981122229).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68981122211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68981122271) 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, 27665 + ... + 372461.

It is an arithmetic number, because the mean of its divisors is an integer number (17245416768).

Almost surely, 2^68981122211 is an apocalyptic number.

68981122211 is a deficient number, since it is larger than the sum of its proper divisors (544861).

68981122211 is a wasteful number, since it uses less digits than its factorization.

68981122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544860.

The product of its digits is 27648, while the sum is 41.

The spelling of 68981122211 in words is "sixty-eight billion, nine hundred eighty-one million, one hundred twenty-two thousand, two hundred eleven".