122821356671 has 4 divisors (see below), whose sum is σ = 132269153352. Its totient is φ = 113373559992.

The previous prime is 122821356607. The next prime is 122821356677. The reversal of 122821356671 is 176653128221.

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 122821356671 - 2⁶ = 122821356607 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 (122821356677) 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, 4723898321 + ... + 4723898346.

It is an arithmetic number, because the mean of its divisors is an integer number (33067288338).

Almost surely, 2^122821356671 is an apocalyptic number.

122821356671 is a deficient number, since it is larger than the sum of its proper divisors (9447796681).

122821356671 is an equidigital number, since it uses as much as digits as its factorization.

122821356671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9447796680.

The product of its digits is 241920, while the sum is 44.

The spelling of 122821356671 in words is "one hundred twenty-two billion, eight hundred twenty-one million, three hundred fifty-six thousand, six hundred seventy-one".