122121000021 has 8 divisors (see below), whose sum is σ = 162830188864. Its totient is φ = 81412905600.

The previous prime is 122120999977. The next prime is 122121000047. The reversal of 122121000021 is 120000121221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-122121000021 is a prime.

It is a super-2 number, since 2×122121000021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 122120999970 and 122121000006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122121000061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37200 + ... + 495606.

It is an arithmetic number, because the mean of its divisors is an integer number (20353773608).

Almost surely, 2^122121000021 is an apocalyptic number.

It is an amenable number.

122121000021 is a deficient number, since it is larger than the sum of its proper divisors (40709188843).

122121000021 is an equidigital number, since it uses as much as digits as its factorization.

122121000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547211.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 122121000021 its reverse (120000121221), we get a palindrome (242121121242).

The spelling of 122121000021 in words is "one hundred twenty-two billion, one hundred twenty-one million, twenty-one", and thus it is an aban number.