2011212122201 has 4 divisors (see below), whose sum is σ = 2011613646900. Its totient is φ = 2010810597504.

The previous prime is 2011212122189. The next prime is 2011212122251. The reversal of 2011212122201 is 1022212121102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 583543210000 + 1427668912201 = 763900^2 + 1194851^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011212122201 - 2¹⁸ = 2011211860057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2011212122201.

It is not an unprimeable number, because it can be changed into a prime (2011212122251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200754836 + ... + 200764853.

It is an arithmetic number, because the mean of its divisors is an integer number (502903411725).

Almost surely, 2^{2011212122201} is an apocalyptic number.

It is an amenable number.

2011212122201 is a deficient number, since it is larger than the sum of its proper divisors (401524699).

2011212122201 is an equidigital number, since it uses as much as digits as its factorization.

2011212122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401524698.

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

Adding to 2011212122201 its reverse (1022212121102), we get a palindrome (3033424243303).

The spelling of 2011212122201 in words is "two trillion, eleven billion, two hundred twelve million, one hundred twenty-two thousand, two hundred one".