102122020191 has 8 divisors (see below), whose sum is σ = 136316901760. Its totient is φ = 68004242712.

The previous prime is 102122020183. The next prime is 102122020193. The reversal of 102122020191 is 191020221201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102122020191 - 2³ = 102122020183 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 (102122020193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19272931 + ... + 19278228.

It is an arithmetic number, because the mean of its divisors is an integer number (17039612720).

Almost surely, 2^102122020191 is an apocalyptic number.

102122020191 is a deficient number, since it is larger than the sum of its proper divisors (34194881569).

102122020191 is an equidigital number, since it uses as much as digits as its factorization.

102122020191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38552045.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 102122020191 its reverse (191020221201), we get a palindrome (293142241392).

The spelling of 102122020191 in words is "one hundred two billion, one hundred twenty-two million, twenty thousand, one hundred ninety-one".