122120201200021 has 4 divisors (see below), whose sum is σ = 122120272733344. Its totient is φ = 122120129666700.

The previous prime is 122120201199973. The next prime is 122120201200027. The reversal of 122120201200021 is 120002102021221.

It is a happy number.

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 122120201200021 - 2¹³ = 122120201191829 is a prime.

It is a super-2 number, since 2×122120201200021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122120201199968 and 122120201200004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122120201200027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33141675 + ... + 36641656.

It is an arithmetic number, because the mean of its divisors is an integer number (30530068183336).

Almost surely, 2^{122120201200021} is an apocalyptic number.

It is an amenable number.

122120201200021 is a deficient number, since it is larger than the sum of its proper divisors (71533323).

122120201200021 is an equidigital number, since it uses as much as digits as its factorization.

122120201200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71533322.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 122120201200021 its reverse (120002102021221), we get a palindrome (242122303221242).

The spelling of 122120201200021 in words is "one hundred twenty-two trillion, one hundred twenty billion, two hundred one million, two hundred thousand, twenty-one".