101020002191 has 2 divisors, whose sum is σ = 101020002192. Its totient is φ = 101020002190.

The previous prime is 101020002169. The next prime is 101020002229. The reversal of 101020002191 is 191200020101.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101020002191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101020004191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50510001095 + 50510001096.

It is an arithmetic number, because the mean of its divisors is an integer number (50510001096).

Almost surely, 2^101020002191 is an apocalyptic number.

101020002191 is a deficient number, since it is larger than the sum of its proper divisors (1).

101020002191 is an equidigital number, since it uses as much as digits as its factorization.

101020002191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 101020002191 its reverse (191200020101), we get a palindrome (292220022292).

The spelling of 101020002191 in words is "one hundred one billion, twenty million, two thousand, one hundred ninety-one".