20122012121 has 2 divisors, whose sum is σ = 20122012122. Its totient is φ = 20122012120.

The previous prime is 20122012069. The next prime is 20122012133. The reversal of 20122012121 is 12121022102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10084176400 + 10037835721 = 100420^2 + 100189^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122012121 - 2¹⁴ = 20121995737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20122012096 and 20122012105.

It is not a weakly prime, because it can be changed into another prime (20122018121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061006060 + 10061006061.

It is an arithmetic number, because the mean of its divisors is an integer number (10061006061).

Almost surely, 2^20122012121 is an apocalyptic number.

It is an amenable number.

20122012121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122012121 is an equidigital number, since it uses as much as digits as its factorization.

20122012121 is an evil number, because the sum of its binary digits is even.

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

Adding to 20122012121 its reverse (12121022102), we get a palindrome (32243034223).

The spelling of 20122012121 in words is "twenty billion, one hundred twenty-two million, twelve thousand, one hundred twenty-one".