211222057 has 2 divisors, whose sum is σ = 211222058. Its totient is φ = 211222056.

The previous prime is 211222019. The next prime is 211222061. The reversal of 211222057 is 750222112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156225001 + 54997056 = 12499^2 + 7416^2 .

It is a cyclic number.

It is not a de Polignac number, because 211222057 - 2¹⁹ = 210697769 is a prime.

It is a super-2 number, since 2×211222057² = 89229514726622498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211222097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105611028 + 105611029.

It is an arithmetic number, because the mean of its divisors is an integer number (105611029).

Almost surely, 2^211222057 is an apocalyptic number.

It is an amenable number.

211222057 is a deficient number, since it is larger than the sum of its proper divisors (1).

211222057 is an equidigital number, since it uses as much as digits as its factorization.

211222057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 211222057 is about 14533.4805535357. The cubic root of 211222057 is about 595.5429518892.

Adding to 211222057 its reverse (750222112), we get a palindrome (961444169).

The spelling of 211222057 in words is "two hundred eleven million, two hundred twenty-two thousand, fifty-seven".