20202211121 has 2 divisors, whose sum is σ = 20202211122. Its totient is φ = 20202211120.

The previous prime is 20202211093. The next prime is 20202211213. The reversal of 20202211121 is 12111220202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18513412096 + 1688799025 = 136064^2 + 41095^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202211121 - 2¹⁰ = 20202210097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20202211096 and 20202211105.

It is not a weakly prime, because it can be changed into another prime (20202211021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101105560 + 10101105561.

It is an arithmetic number, because the mean of its divisors is an integer number (10101105561).

Almost surely, 2^20202211121 is an apocalyptic number.

It is an amenable number.

20202211121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202211121 is an equidigital number, since it uses as much as digits as its factorization.

20202211121 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 20202211121 its reverse (12111220202), we get a palindrome (32313431323).

The spelling of 20202211121 in words is "twenty billion, two hundred two million, two hundred eleven thousand, one hundred twenty-one".