11020121010421 has 2 divisors, whose sum is σ = 11020121010422. Its totient is φ = 11020121010420.

The previous prime is 11020121010361. The next prime is 11020121010427. The reversal of 11020121010421 is 12401012102011.

11020121010421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10381032685521 + 639088324900 = 3221961^2 + 799430^2 .

It is a cyclic number.

It is not a de Polignac number, because 11020121010421 - 2¹¹ = 11020121008373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11020121010395 and 11020121010404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11020121010427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510060505210 + 5510060505211.

It is an arithmetic number, because the mean of its divisors is an integer number (5510060505211).

Almost surely, 2^{11020121010421} is an apocalyptic number.

It is an amenable number.

11020121010421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11020121010421 is an equidigital number, since it uses as much as digits as its factorization.

11020121010421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11020121010421 its reverse (12401012102011), we get a palindrome (23421133112432).

The spelling of 11020121010421 in words is "eleven trillion, twenty billion, one hundred twenty-one million, ten thousand, four hundred twenty-one".