2011011421 has 2 divisors, whose sum is σ = 2011011422. Its totient is φ = 2011011420.

The previous prime is 2011011403. The next prime is 2011011491. The reversal of 2011011421 is 1241101102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1396516900 + 614494521 = 37370^2 + 24789^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011011421 - 2⁵ = 2011011389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011011491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005505710 + 1005505711.

It is an arithmetic number, because the mean of its divisors is an integer number (1005505711).

Almost surely, 2^2011011421 is an apocalyptic number.

It is an amenable number.

2011011421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011011421 is an equidigital number, since it uses as much as digits as its factorization.

2011011421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 2011011421 is about 44844.3019903309. The cubic root of 2011011421 is about 1262.2290728123.

Adding to 2011011421 its reverse (1241101102), we get a palindrome (3252112523).

The spelling of 2011011421 in words is "two billion, eleven million, eleven thousand, four hundred twenty-one".