102122191909 has 2 divisors, whose sum is σ = 102122191910. Its totient is φ = 102122191908.

The previous prime is 102122191879. The next prime is 102122191939. The reversal of 102122191909 is 909191221201.

It is a balanced prime because it is at equal distance from previous prime (102122191879) and next prime (102122191939).

It can be written as a sum of positive squares in only one way, i.e., 86699035809 + 15423156100 = 294447^2 + 124190^2 .

It is a cyclic number.

It is not a de Polignac number, because 102122191909 - 2¹³ = 102122183717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102122191939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51061095954 + 51061095955.

It is an arithmetic number, because the mean of its divisors is an integer number (51061095955).

Almost surely, 2^102122191909 is an apocalyptic number.

It is an amenable number.

102122191909 is a deficient number, since it is larger than the sum of its proper divisors (1).

102122191909 is an equidigital number, since it uses as much as digits as its factorization.

102122191909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 37.

The spelling of 102122191909 in words is "one hundred two billion, one hundred twenty-two million, one hundred ninety-one thousand, nine hundred nine".