1211111022211 has 8 divisors (see below), whose sum is σ = 1213100005824. Its totient is φ = 1209122350080.

The previous prime is 1211111022203. The next prime is 1211111022311. The reversal of 1211111022211 is 1122201111121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211111022211 - 2³ = 1211111022203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211111022311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8471721 + ... + 8613493.

It is an arithmetic number, because the mean of its divisors is an integer number (151637500728).

Almost surely, 2^{1211111022211} is an apocalyptic number.

1211111022211 is a deficient number, since it is larger than the sum of its proper divisors (1988983613).

1211111022211 is a wasteful number, since it uses less digits than its factorization.

1211111022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155741.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 1211111022211 its reverse (1122201111121), we get a palindrome (2333312133332).

The spelling of 1211111022211 in words is "one trillion, two hundred eleven billion, one hundred eleven million, twenty-two thousand, two hundred eleven".