1011211012187 has 2 divisors, whose sum is σ = 1011211012188. Its totient is φ = 1011211012186.

The previous prime is 1011211012159. The next prime is 1011211012271. The reversal of 1011211012187 is 7812101121101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1011211012187 - 2¹² = 1011211008091 is a prime.

It is a super-2 number, since 2×1011211012187² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1011211012787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505605506093 + 505605506094.

It is an arithmetic number, because the mean of its divisors is an integer number (505605506094).

Almost surely, 2^{1011211012187} is an apocalyptic number.

1011211012187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011211012187 is an equidigital number, since it uses as much as digits as its factorization.

1011211012187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 26.

Adding to 1011211012187 its reverse (7812101121101), we get a palindrome (8823312133288).

The spelling of 1011211012187 in words is "one trillion, eleven billion, two hundred eleven million, twelve thousand, one hundred eighty-seven".