20010201121 has 2 divisors, whose sum is σ = 20010201122. Its totient is φ = 20010201120.

The previous prime is 20010201037. The next prime is 20010201161. The reversal of 20010201121 is 12110201002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16889861521 + 3120339600 = 129961^2 + 55860^2 .

It is a cyclic number.

It is not a de Polignac number, because 20010201121 - 2¹¹ = 20010199073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20010201098 and 20010201107.

It is not a weakly prime, because it can be changed into another prime (20010201161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005100560 + 10005100561.

It is an arithmetic number, because the mean of its divisors is an integer number (10005100561).

Almost surely, 2^20010201121 is an apocalyptic number.

It is an amenable number.

20010201121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010201121 is an equidigital number, since it uses as much as digits as its factorization.

20010201121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20010201121 its reverse (12110201002), we get a palindrome (32120402123).

The spelling of 20010201121 in words is "twenty billion, ten million, two hundred one thousand, one hundred twenty-one".