102010122191 has 4 divisors (see below), whose sum is σ = 108010717632. Its totient is φ = 96009526752.

The previous prime is 102010122187. The next prime is 102010122197. The reversal of 102010122191 is 191221010201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102010122191 - 2² = 102010122187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102010122197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3000297695 + ... + 3000297728.

It is an arithmetic number, because the mean of its divisors is an integer number (27002679408).

Almost surely, 2^102010122191 is an apocalyptic number.

102010122191 is a deficient number, since it is larger than the sum of its proper divisors (6000595441).

102010122191 is an equidigital number, since it uses as much as digits as its factorization.

102010122191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6000595440.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 102010122191 its reverse (191221010201), we get a palindrome (293231132392).

The spelling of 102010122191 in words is "one hundred two billion, ten million, one hundred twenty-two thousand, one hundred ninety-one".