1212121110011 has 16 divisors (see below), whose sum is σ = 1400409699840. Its totient is φ = 1027644933120.

The previous prime is 1212121110007. The next prime is 1212121110047. The reversal of 1212121110011 is 1100111212121.

It is a cyclic number.

It is not a de Polignac number, because 1212121110011 - 2² = 1212121110007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212121110001) 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, 782231 + ... + 1742448.

It is an arithmetic number, because the mean of its divisors is an integer number (87525606240).

Almost surely, 2^{1212121110011} is an apocalyptic number.

1212121110011 is a deficient number, since it is larger than the sum of its proper divisors (188288589829).

1212121110011 is a wasteful number, since it uses less digits than its factorization.

1212121110011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525434.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1212121110011 its reverse (1100111212121), we get a palindrome (2312232322132).

It can be divided in two parts, 1212121 and 110011, that multiplied together give a palindrome (133346643331).

The spelling of 1212121110011 in words is "one trillion, two hundred twelve billion, one hundred twenty-one million, one hundred ten thousand, eleven".