11012001021221 has 2 divisors, whose sum is σ = 11012001021222. Its totient is φ = 11012001021220.

The previous prime is 11012001021211. The next prime is 11012001021233. The reversal of 11012001021221 is 12212010021011.

11012001021221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7008520264321 + 4003480756900 = 2647361^2 + 2000870^2 .

It is a cyclic number.

It is not a de Polignac number, because 11012001021221 - 2⁶ = 11012001021157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11012001021196 and 11012001021205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11012001021211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5506000510610 + 5506000510611.

It is an arithmetic number, because the mean of its divisors is an integer number (5506000510611).

Almost surely, 2^{11012001021221} is an apocalyptic number.

It is an amenable number.

11012001021221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11012001021221 is an equidigital number, since it uses as much as digits as its factorization.

11012001021221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11012001021221 its reverse (12212010021011), we get a palindrome (23224011042232).

The spelling of 11012001021221 in words is "eleven trillion, twelve billion, one million, twenty-one thousand, two hundred twenty-one".