2111121210971 has 2 divisors, whose sum is σ = 2111121210972. Its totient is φ = 2111121210970.

The previous prime is 2111121210917. The next prime is 2111121211039. The reversal of 2111121210971 is 1790121211112.

Together with previous prime (2111121210917) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2111121210971 - 2²⁶ = 2111054102107 is a prime.

It is a super-2 number, since 2×2111121210971² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2111121210911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055560605485 + 1055560605486.

It is an arithmetic number, because the mean of its divisors is an integer number (1055560605486).

Almost surely, 2^{2111121210971} is an apocalyptic number.

2111121210971 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111121210971 is an equidigital number, since it uses as much as digits as its factorization.

2111121210971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 29.

The spelling of 2111121210971 in words is "two trillion, one hundred eleven billion, one hundred twenty-one million, two hundred ten thousand, nine hundred seventy-one".