1211210110011 has 16 divisors (see below), whose sum is σ = 1802731328640. Its totient is φ = 716995413120.

The previous prime is 1211210110009. The next prime is 1211210110021. The reversal of 1211210110011 is 1100110121121.

It is not a de Polignac number, because 1211210110011 - 2¹ = 1211210110009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211210110021) 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, 426781566 + ... + 426784403.

It is an arithmetic number, because the mean of its divisors is an integer number (112670708040).

Almost surely, 2^{1211210110011} is an apocalyptic number.

1211210110011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1211210110011 is a deficient number, since it is larger than the sum of its proper divisors (591521218629).

1211210110011 is a wasteful number, since it uses less digits than its factorization.

1211210110011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853566026.

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

Adding to 1211210110011 its reverse (1100110121121), we get a palindrome (2311320231132).

The spelling of 1211210110011 in words is "one trillion, two hundred eleven billion, two hundred ten million, one hundred ten thousand, eleven".