1210211112111 has 16 divisors (see below), whose sum is σ = 1669325923200. Its totient is φ = 778954161888.

The previous prime is 1210211112067. The next prime is 1210211112119. The reversal of 1210211112111 is 1112111120121.

It is not a de Polignac number, because 1210211112111 - 2⁷ = 1210211111983 is a prime.

It is a super-2 number, since 2×1210211112111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210211112119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1918260 + ... + 2469846.

It is an arithmetic number, because the mean of its divisors is an integer number (104332870200).

Almost surely, 2^{1210211112111} is an apocalyptic number.

1210211112111 is a deficient number, since it is larger than the sum of its proper divisors (459114811089).

1210211112111 is a wasteful number, since it uses less digits than its factorization.

1210211112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576838.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 1210211112111 its reverse (1112111120121), we get a palindrome (2322322232232).

The spelling of 1210211112111 in words is "one trillion, two hundred ten billion, two hundred eleven million, one hundred twelve thousand, one hundred eleven".