10211100021971 has 2 divisors, whose sum is σ = 10211100021972. Its totient is φ = 10211100021970.

The previous prime is 10211100021911. The next prime is 10211100022049. The reversal of 10211100021971 is 17912000111201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10211100021971 - 2⁶ = 10211100021907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10211100021971.

It is not a weakly prime, because it can be changed into another prime (10211100021911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105550010985 + 5105550010986.

It is an arithmetic number, because the mean of its divisors is an integer number (5105550010986).

Almost surely, 2^{10211100021971} is an apocalyptic number.

10211100021971 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211100021971 is an equidigital number, since it uses as much as digits as its factorization.

10211100021971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 26.

The spelling of 10211100021971 in words is "ten trillion, two hundred eleven billion, one hundred million, twenty-one thousand, nine hundred seventy-one".