2111111421 has 8 divisors (see below), whose sum is σ = 2815042464. Its totient is φ = 1407294000.

The previous prime is 2111111411. The next prime is 2111111447. The reversal of 2111111421 is 1241111112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2111111421 - 2⁷ = 2111111293 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2111111421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111111411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35475 + ... + 74031.

It is an arithmetic number, because the mean of its divisors is an integer number (351880308).

Almost surely, 2^2111111421 is an apocalyptic number.

It is an amenable number.

2111111421 is a deficient number, since it is larger than the sum of its proper divisors (703931043).

2111111421 is a wasteful number, since it uses less digits than its factorization.

2111111421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56811.

The product of its digits is 16, while the sum is 15.

The square root of 2111111421 is about 45946.8325458894. The cubic root of 2111111421 is about 1282.8337731944.

Adding to 2111111421 its reverse (1241111112), we get a palindrome (3352222533).

The spelling of 2111111421 in words is "two billion, one hundred eleven million, one hundred eleven thousand, four hundred twenty-one".