1211101100211 has 16 divisors (see below), whose sum is σ = 1699919591040. Its totient is φ = 764848100160.

The previous prime is 1211101100177. The next prime is 1211101100219. The reversal of 1211101100211 is 1120011011121.

It is not a de Polignac number, because 1211101100211 - 2²³ = 1211092711603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211101100219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37050 + ... + 1556783.

It is an arithmetic number, because the mean of its divisors is an integer number (106244974440).

Almost surely, 2^{1211101100211} is an apocalyptic number.

1211101100211 is a deficient number, since it is larger than the sum of its proper divisors (488818490829).

1211101100211 is a wasteful number, since it uses less digits than its factorization.

1211101100211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1607186.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1211101100211 its reverse (1120011011121), we get a palindrome (2331112111332).

The spelling of 1211101100211 in words is "one trillion, two hundred eleven billion, one hundred one million, one hundred thousand, two hundred eleven".