1211112112211 has 16 divisors (see below), whose sum is σ = 1290768804864. Its totient is φ = 1133709629184.

The previous prime is 1211112112157. The next prime is 1211112112219. The reversal of 1211112112211 is 1122112111121.

It is not a de Polignac number, because 1211112112211 - 2³⁸ = 936234205267 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 1211112112211.

It is not an unprimeable number, because it can be changed into a prime (1211112112219) 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, 14592116 + ... + 14674878.

It is an arithmetic number, because the mean of its divisors is an integer number (80673050304).

Almost surely, 2^{1211112112211} is an apocalyptic number.

1211112112211 is a deficient number, since it is larger than the sum of its proper divisors (79656692653).

1211112112211 is a wasteful number, since it uses less digits than its factorization.

1211112112211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96370.

The product of its digits is 16, while the sum is 17.

Adding to 1211112112211 its reverse (1122112111121), we get a palindrome (2333224223332).

It can be divided in two parts, 121111 and 2112211, that added together give a palindrome (2233322).

The spelling of 1211112112211 in words is "one trillion, two hundred eleven billion, one hundred twelve million, one hundred twelve thousand, two hundred eleven".