1131202111211 has 2 divisors, whose sum is σ = 1131202111212. Its totient is φ = 1131202111210.

The previous prime is 1131202111183. The next prime is 1131202111337. The reversal of 1131202111211 is 1121112021311.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131202111211 is a prime.

It is a super-2 number, since 2×1131202111211² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1131202111211.

It is not a weakly prime, because it can be changed into another prime (1131202113211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565601055605 + 565601055606.

It is an arithmetic number, because the mean of its divisors is an integer number (565601055606).

Almost surely, 2^{1131202111211} is an apocalyptic number.

1131202111211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131202111211 is an equidigital number, since it uses as much as digits as its factorization.

1131202111211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 1131202111211 its reverse (1121112021311), we get a palindrome (2252314132522).

The spelling of 1131202111211 in words is "one trillion, one hundred thirty-one billion, two hundred two million, one hundred eleven thousand, two hundred eleven".