2011443421 has 8 divisors (see below), whose sum is σ = 2166518144. Its totient is φ = 1856418480.

The previous prime is 2011443353. The next prime is 2011443457. The reversal of 2011443421 is 1243441102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2011443421 - 2¹³ = 2011435229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011443392 and 2011443401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011443461) 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, 154840 + ... + 167326.

It is an arithmetic number, because the mean of its divisors is an integer number (270814768).

Almost surely, 2^2011443421 is an apocalyptic number.

It is an amenable number.

2011443421 is a deficient number, since it is larger than the sum of its proper divisors (155074723).

2011443421 is a wasteful number, since it uses less digits than its factorization.

2011443421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24891.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 2011443421 is about 44849.1183971324. The cubic root of 2011443421 is about 1262.3194492124.

Adding to 2011443421 its reverse (1243441102), we get a palindrome (3254884523).

The spelling of 2011443421 in words is "two billion, eleven million, four hundred forty-three thousand, four hundred twenty-one".