11011021220321 has 2 divisors, whose sum is σ = 11011021220322. Its totient is φ = 11011021220320.

The previous prime is 11011021220299. The next prime is 11011021220333. The reversal of 11011021220321 is 12302212011011.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10647749821921 + 363271398400 = 3263089^2 + 602720^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011021220321 - 2²² = 11011017026017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11011021220321.

It is not a weakly prime, because it can be changed into another prime (11011021222321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505510610160 + 5505510610161.

It is an arithmetic number, because the mean of its divisors is an integer number (5505510610161).

Almost surely, 2^{11011021220321} is an apocalyptic number.

It is an amenable number.

11011021220321 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011021220321 is an equidigital number, since it uses as much as digits as its factorization.

11011021220321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 11011021220321 its reverse (12302212011011), we get a palindrome (23313233231332).

The spelling of 11011021220321 in words is "eleven trillion, eleven billion, twenty-one million, two hundred twenty thousand, three hundred twenty-one".