11012420020421 has 4 divisors (see below), whose sum is σ = 11024274079500. Its totient is φ = 11000565961344.

The previous prime is 11012420020409. The next prime is 11012420020447. The reversal of 11012420020421 is 12402002421011.

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 4479212452225 + 6533207568196 = 2116415^2 + 2556014^2 .

It is a cyclic number.

It is not a de Polignac number, because 11012420020421 - 2¹⁰ = 11012420019397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11012420020393 and 11012420020402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11012420029421) 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, 5927028146 + ... + 5927030003.

It is an arithmetic number, because the mean of its divisors is an integer number (2756068519875).

Almost surely, 2^{11012420020421} is an apocalyptic number.

It is an amenable number.

11012420020421 is a deficient number, since it is larger than the sum of its proper divisors (11854059079).

11012420020421 is an equidigital number, since it uses as much as digits as its factorization.

11012420020421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11854059078.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 11012420020421 its reverse (12402002421011), we get a palindrome (23414422441432).

The spelling of 11012420020421 in words is "eleven trillion, twelve billion, four hundred twenty million, twenty thousand, four hundred twenty-one".