11011021221071 has 2 divisors, whose sum is σ = 11011021221072. Its totient is φ = 11011021221070.

The previous prime is 11011021221037. The next prime is 11011021221131. The reversal of 11011021221071 is 17012212011011.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11011021221071 - 2⁶ = 11011021221007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11011021221371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505510610535 + 5505510610536.

It is an arithmetic number, because the mean of its divisors is an integer number (5505510610536).

Almost surely, 2^{11011021221071} is an apocalyptic number.

11011021221071 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011021221071 is an equidigital number, since it uses as much as digits as its factorization.

11011021221071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 20.

Adding to 11011021221071 its reverse (17012212011011), we get a palindrome (28023233232082).

The spelling of 11011021221071 in words is "eleven trillion, eleven billion, twenty-one million, two hundred twenty-one thousand, seventy-one".