20000001121 has 2 divisors, whose sum is σ = 20000001122. Its totient is φ = 20000001120.

The previous prime is 20000001031. The next prime is 20000001143. The reversal of 20000001121 is 12110000002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12580762896 + 7419238225 = 112164^2 + 86135^2 .

It is a cyclic number.

It is not a de Polignac number, because 20000001121 - 2¹¹ = 19999999073 is a prime.

It is not a weakly prime, because it can be changed into another prime (20000001181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000000560 + 10000000561.

It is an arithmetic number, because the mean of its divisors is an integer number (10000000561).

Almost surely, 2^20000001121 is an apocalyptic number.

It is an amenable number.

20000001121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000001121 is an equidigital number, since it uses as much as digits as its factorization.

20000001121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 20000001121 its reverse (12110000002), we get a palindrome (32110001123).

The spelling of 20000001121 in words is "twenty billion, one thousand, one hundred twenty-one".