2011111100121 has 4 divisors (see below), whose sum is σ = 2681481466832. Its totient is φ = 1340740733412.

The previous prime is 2011111100113. The next prime is 2011111100129. The reversal of 2011111100121 is 1210011111102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2011111100113) and next prime (2011111100129).

It is not a de Polignac number, because 2011111100121 - 2³ = 2011111100113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011111100097 and 2011111100106.

It is not an unprimeable number, because it can be changed into a prime (2011111100129) 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, 335185183351 + ... + 335185183356.

It is an arithmetic number, because the mean of its divisors is an integer number (670370366708).

Almost surely, 2^{2011111100121} is an apocalyptic number.

It is an amenable number.

2011111100121 is a deficient number, since it is larger than the sum of its proper divisors (670370366711).

2011111100121 is an equidigital number, since it uses as much as digits as its factorization.

2011111100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670370366710.

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

Adding to 2011111100121 its reverse (1210011111102), we get a palindrome (3221122211223).

The spelling of 2011111100121 in words is "two trillion, eleven billion, one hundred eleven million, one hundred thousand, one hundred twenty-one".