2121111200011 has 4 divisors (see below), whose sum is σ = 2129176261872. Its totient is φ = 2113046138152.

The previous prime is 2121111200009. The next prime is 2121111200017. The reversal of 2121111200011 is 1100021111212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2121111200011 - 2¹ = 2121111200009 is a prime.

It is a super-2 number, since 2×2121111200011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121111199964 and 2121111200000.

It is not an unprimeable number, because it can be changed into a prime (2121111200017) 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, 4032530536 + ... + 4032531061.

It is an arithmetic number, because the mean of its divisors is an integer number (532294065468).

Almost surely, 2^{2121111200011} is an apocalyptic number.

2121111200011 is a deficient number, since it is larger than the sum of its proper divisors (8065061861).

2121111200011 is an equidigital number, since it uses as much as digits as its factorization.

2121111200011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8065061860.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2121111200011 its reverse (1100021111212), we get a palindrome (3221132311223).

The spelling of 2121111200011 in words is "two trillion, one hundred twenty-one billion, one hundred eleven million, two hundred thousand, eleven".