122071120721 has 4 divisors (see below), whose sum is σ = 133168495344. Its totient is φ = 110973746100.

The previous prime is 122071120679. The next prime is 122071120733. The reversal of 122071120721 is 127021170221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122071120721 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (122071120021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5548687295 + ... + 5548687316.

It is an arithmetic number, because the mean of its divisors is an integer number (33292123836).

Almost surely, 2^122071120721 is an apocalyptic number.

122071120721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122071120721 is a deficient number, since it is larger than the sum of its proper divisors (11097374623).

122071120721 is a wasteful number, since it uses less digits than its factorization.

122071120721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11097374622.

The product of its (nonzero) digits is 784, while the sum is 26.

Adding to 122071120721 its reverse (127021170221), we get a palindrome (249092290942).

The spelling of 122071120721 in words is "one hundred twenty-two billion, seventy-one million, one hundred twenty thousand, seven hundred twenty-one".