10201210991 has 2 divisors, whose sum is σ = 10201210992. Its totient is φ = 10201210990.

The previous prime is 10201210969. The next prime is 10201210997. The reversal of 10201210991 is 19901210201.

It is a strong prime.

It is an emirp because it is prime and its reverse (19901210201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10201210991 - 2²⁶ = 10134102127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10201210991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10201210997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5100605495 + 5100605496.

It is an arithmetic number, because the mean of its divisors is an integer number (5100605496).

Almost surely, 2^10201210991 is an apocalyptic number.

10201210991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10201210991 is an equidigital number, since it uses as much as digits as its factorization.

10201210991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 26.

The spelling of 10201210991 in words is "ten billion, two hundred one million, two hundred ten thousand, nine hundred ninety-one".