20212211057 has 2 divisors, whose sum is σ = 20212211058. Its totient is φ = 20212211056.

The previous prime is 20212211053. The next prime is 20212211087. The reversal of 20212211057 is 75011221202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15030514801 + 5181696256 = 122599^2 + 71984^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212211057 - 2² = 20212211053 is a prime.

It is not a weakly prime, because it can be changed into another prime (20212211053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106105528 + 10106105529.

It is an arithmetic number, because the mean of its divisors is an integer number (10106105529).

Almost surely, 2^20212211057 is an apocalyptic number.

It is an amenable number.

20212211057 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212211057 is an equidigital number, since it uses as much as digits as its factorization.

20212211057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 23.

Adding to 20212211057 its reverse (75011221202), we get a palindrome (95223432259).

The spelling of 20212211057 in words is "twenty billion, two hundred twelve million, two hundred eleven thousand, fifty-seven".