11212122011971 has 2 divisors, whose sum is σ = 11212122011972. Its totient is φ = 11212122011970.

The previous prime is 11212122011933. The next prime is 11212122012001. The reversal of 11212122011971 is 17911022121211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11212122011971 - 2¹³ = 11212122003779 is a prime.

It is a super-2 number, since 2×11212122011971² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11212122011471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606061005985 + 5606061005986.

It is an arithmetic number, because the mean of its divisors is an integer number (5606061005986).

Almost surely, 2^{11212122011971} is an apocalyptic number.

11212122011971 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212122011971 is an equidigital number, since it uses as much as digits as its factorization.

11212122011971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 31.

The spelling of 11212122011971 in words is "eleven trillion, two hundred twelve billion, one hundred twenty-two million, eleven thousand, nine hundred seventy-one".