68911222121 has 16 divisors (see below), whose sum is σ = 79137345408. Its totient is φ = 58780857600.

The previous prime is 68911222111. The next prime is 68911222153. The reversal of 68911222121 is 12122211986.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68911222121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68911222111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2555891 + ... + 2582711.

It is an arithmetic number, because the mean of its divisors is an integer number (4946084088).

Almost surely, 2^68911222121 is an apocalyptic number.

It is an amenable number.

68911222121 is a deficient number, since it is larger than the sum of its proper divisors (10226123287).

68911222121 is a wasteful number, since it uses less digits than its factorization.

68911222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28592.

The product of its digits is 6912, while the sum is 35.

The spelling of 68911222121 in words is "sixty-eight billion, nine hundred eleven million, two hundred twenty-two thousand, one hundred twenty-one".