2111421 has 8 divisors (see below), whose sum is σ = 3031840. Its totient is φ = 1299312.

The previous prime is 2111419. The next prime is 2111443. The reversal of 2111421 is 1241112.

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 2111421 - 2¹ = 2111419 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2111397 and 2111406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111411) 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, 27031 + ... + 27108.

It is an arithmetic number, because the mean of its divisors is an integer number (378980).

2^2111421 is an apocalyptic number.

It is an amenable number.

2111421 is a deficient number, since it is larger than the sum of its proper divisors (920419).

2111421 is a wasteful number, since it uses less digits than its factorization.

2111421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54155.

The product of its digits is 16, while the sum is 12.

The square root of 2111421 is about 1453.0729506807. The cubic root of 2111421 is about 128.2896476183.

Adding to 2111421 its reverse (1241112), we get a palindrome (3352533).

The spelling of 2111421 in words is "two million, one hundred eleven thousand, four hundred twenty-one".