102122122109 has 6 divisors (see below), whose sum is σ = 118795121694. Its totient is φ = 87533247480.

The previous prime is 102122122103. The next prime is 102122122111. The reversal of 102122122109 is 901221221201.

It can be written as a sum of positive squares in only one way, i.e., 55910021209 + 46212100900 = 236453^2 + 214970^2 .

It is not a de Polignac number, because 102122122109 - 2⁸ = 102122121853 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 (102122122103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1042062422 + ... + 1042062519.

It is an arithmetic number, because the mean of its divisors is an integer number (19799186949).

Almost surely, 2^102122122109 is an apocalyptic number.

It is an amenable number.

102122122109 is a deficient number, since it is larger than the sum of its proper divisors (16672999585).

102122122109 is an equidigital number, since it uses as much as digits as its factorization.

102122122109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084124955 (or 2084124948 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 102122122109 in words is "one hundred two billion, one hundred twenty-two million, one hundred twenty-two thousand, one hundred nine".