2111221212011 has 2 divisors, whose sum is σ = 2111221212012. Its totient is φ = 2111221212010.

The previous prime is 2111221211999. The next prime is 2111221212049. The reversal of 2111221212011 is 1102121221112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2111221212011 - 2⁶ = 2111221211947 is a prime.

It is not a weakly prime, because it can be changed into another prime (2111221512011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055610606005 + 1055610606006.

It is an arithmetic number, because the mean of its divisors is an integer number (1055610606006).

Almost surely, 2^{2111221212011} is an apocalyptic number.

2111221212011 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111221212011 is an equidigital number, since it uses as much as digits as its factorization.

2111221212011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2111221212011 its reverse (1102121221112), we get a palindrome (3213342433123).

It can be divided in two parts, 2111221 and 212011, that added together give a palindrome (2323232).

The spelling of 2111221212011 in words is "two trillion, one hundred eleven billion, two hundred twenty-one million, two hundred twelve thousand, eleven".