111331221001211 has 2 divisors, whose sum is σ = 111331221001212. Its totient is φ = 111331221001210.

The previous prime is 111331221001207. The next prime is 111331221001223. The reversal of 111331221001211 is 112100122133111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111331221001211 - 2² = 111331221001207 is a prime.

It is not a weakly prime, because it can be changed into another prime (111331221001291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55665610500605 + 55665610500606.

It is an arithmetic number, because the mean of its divisors is an integer number (55665610500606).

Almost surely, 2^{111331221001211} is an apocalyptic number.

111331221001211 is a deficient number, since it is larger than the sum of its proper divisors (1).

111331221001211 is an equidigital number, since it uses as much as digits as its factorization.

111331221001211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 111331221001211 its reverse (112100122133111), we get a palindrome (223431343134322).

The spelling of 111331221001211 in words is "one hundred eleven trillion, three hundred thirty-one billion, two hundred twenty-one million, one thousand, two hundred eleven".