1212011112011 has 4 divisors (see below), whose sum is σ = 1385155556592. Its totient is φ = 1038866667432.

The previous prime is 1212011111977. The next prime is 1212011112047. The reversal of 1212011112011 is 1102111102121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212011112011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212011111011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86572222280 + ... + 86572222293.

It is an arithmetic number, because the mean of its divisors is an integer number (346288889148).

Almost surely, 2^{1212011112011} is an apocalyptic number.

1212011112011 is a deficient number, since it is larger than the sum of its proper divisors (173144444581).

1212011112011 is an equidigital number, since it uses as much as digits as its factorization.

1212011112011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173144444580.

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

Adding to 1212011112011 its reverse (1102111102121), we get a palindrome (2314122214132).

The spelling of 1212011112011 in words is "one trillion, two hundred twelve billion, eleven million, one hundred twelve thousand, eleven".