122547420721 has 64 divisors (see below), whose sum is σ = 145210060800. Its totient is φ = 103153564800.

The previous prime is 122547420701. The next prime is 122547420791. The reversal of 122547420721 is 127024745221.

It is not a de Polignac number, because 122547420721 - 2¹¹ = 122547418673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122547420701) 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 63 ways as a sum of consecutive naturals, for example, 204586380 + ... + 204586978.

It is an arithmetic number, because the mean of its divisors is an integer number (2268907200).

Almost surely, 2^122547420721 is an apocalyptic number.

122547420721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122547420721 is a deficient number, since it is larger than the sum of its proper divisors (22662640079).

122547420721 is a wasteful number, since it uses less digits than its factorization.

122547420721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859 (or 837 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 37.

The spelling of 122547420721 in words is "one hundred twenty-two billion, five hundred forty-seven million, four hundred twenty thousand, seven hundred twenty-one".