11211220121071 has 2 divisors, whose sum is σ = 11211220121072. Its totient is φ = 11211220121070.

The previous prime is 11211220120987. The next prime is 11211220121131. The reversal of 11211220121071 is 17012102211211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11211220121071 - 2¹³ = 11211220112879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11211220121771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605610060535 + 5605610060536.

It is an arithmetic number, because the mean of its divisors is an integer number (5605610060536).

Almost surely, 2^{11211220121071} is an apocalyptic number.

11211220121071 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211220121071 is an equidigital number, since it uses as much as digits as its factorization.

11211220121071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 22.

Adding to 11211220121071 its reverse (17012102211211), we get a palindrome (28223322332282).

The spelling of 11211220121071 in words is "eleven trillion, two hundred eleven billion, two hundred twenty million, one hundred twenty-one thousand, seventy-one".