2102121222211 has 4 divisors (see below), whose sum is σ = 2102819372424. Its totient is φ = 2101423072000.

The previous prime is 2102121222169. The next prime is 2102121222247. The reversal of 2102121222211 is 1122221212012.

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 2102121222211 - 2¹⁹ = 2102120697923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2102121222011) 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, 349070590 + ... + 349076611.

It is an arithmetic number, because the mean of its divisors is an integer number (525704843106).

Almost surely, 2^{2102121222211} is an apocalyptic number.

2102121222211 is a deficient number, since it is larger than the sum of its proper divisors (698150213).

2102121222211 is an equidigital number, since it uses as much as digits as its factorization.

2102121222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698150212.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2102121222211 its reverse (1122221212012), we get a palindrome (3224342434223).

The spelling of 2102121222211 in words is "two trillion, one hundred two billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred eleven".