1011211221151 has 2 divisors, whose sum is σ = 1011211221152. Its totient is φ = 1011211221150.

The previous prime is 1011211221127. The next prime is 1011211221169. The reversal of 1011211221151 is 1511221121101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1011211221151 - 2¹⁹ = 1011210696863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011211221191) 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, 505605610575 + 505605610576.

It is an arithmetic number, because the mean of its divisors is an integer number (505605610576).

Almost surely, 2^{1011211221151} is an apocalyptic number.

1011211221151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011211221151 is an equidigital number, since it uses as much as digits as its factorization.

1011211221151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 19.

Adding to 1011211221151 its reverse (1511221121101), we get a palindrome (2522432342252).

The spelling of 1011211221151 in words is "one trillion, eleven billion, two hundred eleven million, two hundred twenty-one thousand, one hundred fifty-one".