2011432421 has 4 divisors (see below), whose sum is σ = 2023059372. Its totient is φ = 1999805472.

The previous prime is 2011432417. The next prime is 2011432447. The reversal of 2011432421 is 1242341102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 980316100 + 1031116321 = 31310^2 + 32111^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011432421 - 2² = 2011432417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011432393 and 2011432402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011432411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5813216 + ... + 5813561.

It is an arithmetic number, because the mean of its divisors is an integer number (505764843).

Almost surely, 2^2011432421 is an apocalyptic number.

It is an amenable number.

2011432421 is a deficient number, since it is larger than the sum of its proper divisors (11626951).

2011432421 is a wasteful number, since it uses less digits than its factorization.

2011432421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11626950.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2011432421 is about 44848.9957635620. The cubic root of 2011432421 is about 1262.3171481221.

Adding to 2011432421 its reverse (1242341102), we get a palindrome (3253773523).

It can be divided in two parts, 20 and 11432421, that multiplied together give a triangular number (228648420 = T₂₁₃₈₄).

The spelling of 2011432421 in words is "two billion, eleven million, four hundred thirty-two thousand, four hundred twenty-one".