122821013 has 4 divisors (see below), whose sum is σ = 140366880. Its totient is φ = 105275148.

The previous prime is 122821007. The next prime is 122821021. The reversal of 122821013 is 310128221.

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 not a de Polignac number, because 122821013 - 2¹⁴ = 122804629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122821043) 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 3 ways as a sum of consecutive naturals, for example, 8772923 + ... + 8772936.

It is an arithmetic number, because the mean of its divisors is an integer number (35091720).

Almost surely, 2^122821013 is an apocalyptic number.

It is an amenable number.

122821013 is a deficient number, since it is larger than the sum of its proper divisors (17545867).

122821013 is an equidigital number, since it uses as much as digits as its factorization.

122821013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17545866.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 122821013 is about 11082.4642115371. The cubic root of 122821013 is about 497.0776368642.

Adding to 122821013 its reverse (310128221), we get a palindrome (432949234).

The spelling of 122821013 in words is "one hundred twenty-two million, eight hundred twenty-one thousand, thirteen".