2011213421 has 8 divisors (see below), whose sum is σ = 2326223424. Its totient is φ = 1703126880.

The previous prime is 2011213411. The next prime is 2011213427. The reversal of 2011213421 is 1243121102.

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

It is not a de Polignac number, because 2011213421 - 2¹⁰ = 2011212397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2011213421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011213427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1730240 + ... + 1731401.

It is an arithmetic number, because the mean of its divisors is an integer number (290777928).

Almost surely, 2^2011213421 is an apocalyptic number.

It is an amenable number.

2011213421 is a deficient number, since it is larger than the sum of its proper divisors (315010003).

2011213421 is an equidigital number, since it uses as much as digits as its factorization.

2011213421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3461731.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 2011213421 is about 44846.5541708613. The cubic root of 2011213421 is about 1262.2713337584.

Adding to 2011213421 its reverse (1243121102), we get a palindrome (3254334523).

It can be divided in two parts, 20112 and 13421, that added together give a palindrome (33533).

The spelling of 2011213421 in words is "two billion, eleven million, two hundred thirteen thousand, four hundred twenty-one".