20122120000121 has 4 divisors (see below), whose sum is σ = 20122716262500. Its totient is φ = 20121523737744.

The previous prime is 20122120000027. The next prime is 20122120000223. The reversal of 20122120000121 is 12100002122102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19335060037225 + 787059962896 = 4397165^2 + 887164^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122120000121 - 2³⁰ = 20121046258297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20122120000096 and 20122120000105.

It is not an unprimeable number, because it can be changed into a prime (20122120002121) 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, 298080566 + ... + 298148063.

It is an arithmetic number, because the mean of its divisors is an integer number (5030679065625).

Almost surely, 2^{20122120000121} is an apocalyptic number.

It is an amenable number.

20122120000121 is a deficient number, since it is larger than the sum of its proper divisors (596262379).

20122120000121 is an equidigital number, since it uses as much as digits as its factorization.

20122120000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596262378.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20122120000121 its reverse (12100002122102), we get a palindrome (32222122122223).

The spelling of 20122120000121 in words is "twenty trillion, one hundred twenty-two billion, one hundred twenty million, one hundred twenty-one", and thus it is an aban number.