1211120101011 has 24 divisors (see below), whose sum is σ = 1757276927280. Its totient is φ = 739380114432.

The previous prime is 1211120101003. The next prime is 1211120101027. The reversal of 1211120101011 is 1101010211121.

It is not a de Polignac number, because 1211120101011 - 2³ = 1211120101003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211120101111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8603466 + ... + 8743103.

It is an arithmetic number, because the mean of its divisors is an integer number (73219871970).

Almost surely, 2^{1211120101011} is an apocalyptic number.

1211120101011 is a deficient number, since it is larger than the sum of its proper divisors (546156826269).

1211120101011 is a wasteful number, since it uses less digits than its factorization.

1211120101011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17346663 (or 17346626 counting only the distinct ones).

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

Adding to 1211120101011 its reverse (1101010211121), we get a palindrome (2312130312132).

It can be divided in two parts, 1211120 and 101011, that added together give a palindrome (1312131).

The spelling of 1211120101011 in words is "one trillion, two hundred eleven billion, one hundred twenty million, one hundred one thousand, eleven".