20200120102121 has 2 divisors, whose sum is σ = 20200120102122. Its totient is φ = 20200120102120.

The previous prime is 20200120102079. The next prime is 20200120102193. The reversal of 20200120102121 is 12120102100202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18816118440025 + 1384001662096 = 4337755^2 + 1176436^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200120102121 - 2²⁶ = 20200052993257 is a prime.

It is a super-2 number, since 2×20200120102121² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20200120102096 and 20200120102105.

It is not a weakly prime, because it can be changed into another prime (20200120102021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100060051060 + 10100060051061.

It is an arithmetic number, because the mean of its divisors is an integer number (10100060051061).

Almost surely, 2^{20200120102121} is an apocalyptic number.

It is an amenable number.

20200120102121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200120102121 is an equidigital number, since it uses as much as digits as its factorization.

20200120102121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20200120102121 its reverse (12120102100202), we get a palindrome (32320222202323).

The spelling of 20200120102121 in words is "twenty trillion, two hundred billion, one hundred twenty million, one hundred two thousand, one hundred twenty-one".