20201103121 has 2 divisors, whose sum is σ = 20201103122. Its totient is φ = 20201103120.

The previous prime is 20201103073. The next prime is 20201103149. The reversal of 20201103121 is 12130110202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19986890625 + 214212496 = 141375^2 + 14636^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201103121 - 2¹⁷ = 20200972049 is a prime.

It is not a weakly prime, because it can be changed into another prime (20201103521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100551560 + 10100551561.

It is an arithmetic number, because the mean of its divisors is an integer number (10100551561).

Almost surely, 2^20201103121 is an apocalyptic number.

It is an amenable number.

20201103121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201103121 is an equidigital number, since it uses as much as digits as its factorization.

20201103121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20201103121 its reverse (12130110202), we get a palindrome (32331213323).

The spelling of 20201103121 in words is "twenty billion, two hundred one million, one hundred three thousand, one hundred twenty-one".