2011421 has 4 divisors (see below), whose sum is σ = 2022144. Its totient is φ = 2000700.

The previous prime is 2011417. The next prime is 2011439. The reversal of 2011421 is 1241102.

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 a cyclic number.

It is not a de Polignac number, because 2011421 - 2² = 2011417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011441) 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, 5075 + ... + 5456.

It is an arithmetic number, because the mean of its divisors is an integer number (505536).

2^2011421 is an apocalyptic number.

It is an amenable number.

2011421 is a deficient number, since it is larger than the sum of its proper divisors (10723).

2011421 is a wasteful number, since it uses less digits than its factorization.

2011421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10722.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2011421 is about 1418.2457473936. The cubic root of 2011421 is about 126.2314758954.

Adding to 2011421 its reverse (1241102), we get a palindrome (3252523).

The spelling of 2011421 in words is "two million, eleven thousand, four hundred twenty-one".