2121012222011 has 4 divisors (see below), whose sum is σ = 2121020655000. Its totient is φ = 2121003789024.

The previous prime is 2121012221983. The next prime is 2121012222023. The reversal of 2121012222011 is 1102222101212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2121012222011 - 2⁶ = 2121012221947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121012222041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3827246 + ... + 4346243.

It is an arithmetic number, because the mean of its divisors is an integer number (530255163750).

Almost surely, 2^{2121012222011} is an apocalyptic number.

2121012222011 is a deficient number, since it is larger than the sum of its proper divisors (8432989).

2121012222011 is an equidigital number, since it uses as much as digits as its factorization.

2121012222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8432988.

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

Adding to 2121012222011 its reverse (1102222101212), we get a palindrome (3223234323223).

The spelling of 2121012222011 in words is "two trillion, one hundred twenty-one billion, twelve million, two hundred twenty-two thousand, eleven".