211220022011 has 2 divisors, whose sum is σ = 211220022012. Its totient is φ = 211220022010.

The previous prime is 211220021981. The next prime is 211220022049. The reversal of 211220022011 is 110220022112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211220022011 - 2¹⁸ = 211219759867 is a prime.

It is a super-2 number, since 2×211220022011² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (211220022311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105610011005 + 105610011006.

It is an arithmetic number, because the mean of its divisors is an integer number (105610011006).

Almost surely, 2^211220022011 is an apocalyptic number.

211220022011 is a deficient number, since it is larger than the sum of its proper divisors (1).

211220022011 is an equidigital number, since it uses as much as digits as its factorization.

211220022011 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 211220022011 its reverse (110220022112), we get a palindrome (321440044123).

The spelling of 211220022011 in words is "two hundred eleven billion, two hundred twenty million, twenty-two thousand, eleven".