1211021111110 has 16 divisors (see below), whose sum is σ = 2182312292832. Its totient is φ = 483858601600.

The previous prime is 1211021111089. The next prime is 1211021111143. The reversal of 1211021111110 is 111111201121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68721106 + ... + 68738725.

It is an arithmetic number, because the mean of its divisors is an integer number (136394518302).

Almost surely, 2^{1211021111110} is an apocalyptic number.

1211021111110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211021111110 is a deficient number, since it is larger than the sum of its proper divisors (971291181722).

1211021111110 is a wasteful number, since it uses less digits than its factorization.

1211021111110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137460719.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 1211021111110 its reverse (111111201121), we get a palindrome (1322132312231).

The spelling of 1211021111110 in words is "one trillion, two hundred eleven billion, twenty-one million, one hundred eleven thousand, one hundred ten".