1211102222211 has 48 divisors (see below), whose sum is σ = 2106860820480. Its totient is φ = 655414689600.

The previous prime is 1211102222173. The next prime is 1211102222233. The reversal of 1211102222211 is 1122222011121.

1211102222211 is a `hidden beast` number, since 1 + 211 + 10 + 222 + 221 + 1 = 666.

It is not a de Polignac number, because 1211102222211 - 2⁹ = 1211102221699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211102212211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3991371 + ... + 4284068.

It is an arithmetic number, because the mean of its divisors is an integer number (43892933760).

Almost surely, 2^{1211102222211} is an apocalyptic number.

1211102222211 is a deficient number, since it is larger than the sum of its proper divisors (895758598269).

1211102222211 is a wasteful number, since it uses less digits than its factorization.

1211102222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8275576 (or 8275573 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1211102222211 its reverse (1122222011121), we get a palindrome (2333324233332).

The spelling of 1211102222211 in words is "one trillion, two hundred eleven billion, one hundred two million, two hundred twenty-two thousand, two hundred eleven".