121722373 has 2 divisors, whose sum is σ = 121722374. Its totient is φ = 121722372.

The previous prime is 121722361. The next prime is 121722401. The reversal of 121722373 is 373227121.

It is a happy number.

It is an a-pointer prime, because the next prime (121722401) can be obtained adding 121722373 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115734564 + 5987809 = 10758^2 + 2447^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121722373 is a prime.

It is a super-2 number, since 2×121722373² = 29632672177502258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121722323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60861186 + 60861187.

It is an arithmetic number, because the mean of its divisors is an integer number (60861187).

Almost surely, 2^121722373 is an apocalyptic number.

It is an amenable number.

121722373 is a deficient number, since it is larger than the sum of its proper divisors (1).

121722373 is an equidigital number, since it uses as much as digits as its factorization.

121722373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 28.

The square root of 121722373 is about 11032.7862754610. The cubic root of 121722373 is about 495.5910675681.

Adding to 121722373 its reverse (373227121), we get a palindrome (494949494).

The spelling of 121722373 in words is "one hundred twenty-one million, seven hundred twenty-two thousand, three hundred seventy-three".