2011111421 has 16 divisors (see below), whose sum is σ = 2307391488. Its totient is φ = 1734994800.

The previous prime is 2011111387. The next prime is 2011111429. The reversal of 2011111421 is 1241111102.

It is a de Polignac number, because none of the positive numbers 2^k-2011111421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011111396 and 2011111405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011111429) 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, 836 + ... + 63426.

It is an arithmetic number, because the mean of its divisors is an integer number (144211968).

Almost surely, 2^2011111421 is an apocalyptic number.

It is an amenable number.

2011111421 is a deficient number, since it is larger than the sum of its proper divisors (296280067).

2011111421 is a wasteful number, since it uses less digits than its factorization.

2011111421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62752.

The product of its (nonzero) digits is 16, while the sum is 14.

The square root of 2011111421 is about 44845.4169453245. The cubic root of 2011111421 is about 1262.2499944264.

Adding to 2011111421 its reverse (1241111102), we get a palindrome (3252222523).

The spelling of 2011111421 in words is "two billion, eleven million, one hundred eleven thousand, four hundred twenty-one".