1202111202181 has 2 divisors, whose sum is σ = 1202111202182. Its totient is φ = 1202111202180.

The previous prime is 1202111202163. The next prime is 1202111202191. The reversal of 1202111202181 is 1812021112021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 961054751556 + 241056450625 = 980334^2 + 490975^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1202111202181 is a prime.

It is a super-2 number, since 2×1202111202181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202111202191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601055601090 + 601055601091.

It is an arithmetic number, because the mean of its divisors is an integer number (601055601091).

Almost surely, 2^{1202111202181} is an apocalyptic number.

It is an amenable number.

1202111202181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202111202181 is an equidigital number, since it uses as much as digits as its factorization.

1202111202181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 22.

The spelling of 1202111202181 in words is "one trillion, two hundred two billion, one hundred eleven million, two hundred two thousand, one hundred eighty-one".