1121212221011 has 2 divisors, whose sum is σ = 1121212221012. Its totient is φ = 1121212221010.

The previous prime is 1121212220977. The next prime is 1121212221067. The reversal of 1121212221011 is 1101222121211.

It is a weak prime.

It is an emirp because it is prime and its reverse (1101222121211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121212221011 - 2²² = 1121208026707 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121212227011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560606110505 + 560606110506.

It is an arithmetic number, because the mean of its divisors is an integer number (560606110506).

Almost surely, 2^{1121212221011} is an apocalyptic number.

1121212221011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121212221011 is an equidigital number, since it uses as much as digits as its factorization.

1121212221011 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 17.

Adding to 1121212221011 its reverse (1101222121211), we get a palindrome (2222434342222).

The spelling of 1121212221011 in words is "one trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twenty-one thousand, eleven".