20122110121 has 2 divisors, whose sum is σ = 20122110122. Its totient is φ = 20122110120.

The previous prime is 20122110097. The next prime is 20122110133. The reversal of 20122110121 is 12101122102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15860631721 + 4261478400 = 125939^2 + 65280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20122110121 is a prime.

It is not a weakly prime, because it can be changed into another prime (20122120121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061055060 + 10061055061.

It is an arithmetic number, because the mean of its divisors is an integer number (10061055061).

Almost surely, 2^20122110121 is an apocalyptic number.

It is an amenable number.

20122110121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122110121 is an equidigital number, since it uses as much as digits as its factorization.

20122110121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20122110121 its reverse (12101122102), we get a palindrome (32223232223).

The spelling of 20122110121 in words is "twenty billion, one hundred twenty-two million, one hundred ten thousand, one hundred twenty-one".