1021222012211 has 2 divisors, whose sum is σ = 1021222012212. Its totient is φ = 1021222012210.

The previous prime is 1021222012163. The next prime is 1021222012231. The reversal of 1021222012211 is 1122102221201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021222012211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021222012211.

It is not a weakly prime, because it can be changed into another prime (1021222012231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510611006105 + 510611006106.

It is an arithmetic number, because the mean of its divisors is an integer number (510611006106).

Almost surely, 2^{1021222012211} is an apocalyptic number.

1021222012211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021222012211 is an equidigital number, since it uses as much as digits as its factorization.

1021222012211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1021222012211 its reverse (1122102221201), we get a palindrome (2143324233412).

The spelling of 1021222012211 in words is "one trillion, twenty-one billion, two hundred twenty-two million, twelve thousand, two hundred eleven".