1211030113111 has 32 divisors (see below), whose sum is σ = 1504343328768. Its totient is φ = 949284887040.

The previous prime is 1211030113093. The next prime is 1211030113127. The reversal of 1211030113111 is 1113110301121.

It is not a de Polignac number, because 1211030113111 - 2⁵ = 1211030113079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211030114111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24767890 + ... + 24816736.

It is an arithmetic number, because the mean of its divisors is an integer number (47010729024).

Almost surely, 2^{1211030113111} is an apocalyptic number.

1211030113111 is a deficient number, since it is larger than the sum of its proper divisors (293313215657).

1211030113111 is a wasteful number, since it uses less digits than its factorization.

1211030113111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51391.

The product of its (nonzero) digits is 18, while the sum is 16.

Adding to 1211030113111 its reverse (1113110301121), we get a palindrome (2324140414232).

The spelling of 1211030113111 in words is "one trillion, two hundred eleven billion, thirty million, one hundred thirteen thousand, one hundred eleven".