122721443 has 4 divisors (see below), whose sum is σ = 132161568. Its totient is φ = 113281320.

The previous prime is 122721413. The next prime is 122721457. The reversal of 122721443 is 344127221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122721443 - 2¹² = 122717347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122721413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4720043 + ... + 4720068.

It is an arithmetic number, because the mean of its divisors is an integer number (33040392).

Almost surely, 2^122721443 is an apocalyptic number.

122721443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

122721443 is a deficient number, since it is larger than the sum of its proper divisors (9440125).

122721443 is an equidigital number, since it uses as much as digits as its factorization.

It is an anagram of its base 8 representation: 122721443 = (724112243)₈.

122721443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9440124.

The product of its digits is 2688, while the sum is 26.

The square root of 122721443 is about 11077.9710687472. The cubic root of 122721443 is about 496.9432749448.

Adding to 122721443 its reverse (344127221), we get a palindrome (466848664).

The spelling of 122721443 in words is "one hundred twenty-two million, seven hundred twenty-one thousand, four hundred forty-three".