122237721 has 16 divisors (see below), whose sum is σ = 181345920. Its totient is φ = 81378000.

The previous prime is 122237719. The next prime is 122237729. The reversal of 122237721 is 127732221.

It is not a de Polignac number, because 122237721 - 2¹ = 122237719 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (122237729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19471 + ... + 24971.

It is an arithmetic number, because the mean of its divisors is an integer number (11334120).

Almost surely, 2^122237721 is an apocalyptic number.

It is an amenable number.

122237721 is a deficient number, since it is larger than the sum of its proper divisors (59108199).

122237721 is an equidigital number, since it uses as much as digits as its factorization.

122237721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6333 (or 6327 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 122237721 is about 11056.1169042300. The cubic root of 122237721 is about 496.2894937341.

Adding to 122237721 its reverse (127732221), we get a palindrome (249969942).

The spelling of 122237721 in words is "one hundred twenty-two million, two hundred thirty-seven thousand, seven hundred twenty-one".