99211571 has 2 divisors, whose sum is σ = 99211572. Its totient is φ = 99211570.

The previous prime is 99211561. The next prime is 99211573. The reversal of 99211571 is 17511299.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99211571 - 2¹⁰ = 99210547 is a prime.

Together with 99211573, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_5718617 and since 99211571 and 5718617 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (99211573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49605785 + 49605786.

It is an arithmetic number, because the mean of its divisors is an integer number (49605786).

Almost surely, 2^99211571 is an apocalyptic number.

99211571 is a deficient number, since it is larger than the sum of its proper divisors (1).

99211571 is an equidigital number, since it uses as much as digits as its factorization.

99211571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5670, while the sum is 35.

The square root of 99211571 is about 9960.5005396315. The cubic root of 99211571 is about 462.9358089352.

The spelling of 99211571 in words is "ninety-nine million, two hundred eleven thousand, five hundred seventy-one".