122102010109 has 4 divisors (see below), whose sum is σ = 122212112220. Its totient is φ = 121991908000.

The previous prime is 122102010101. The next prime is 122102010113. The reversal of 122102010109 is 901010201221.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46460509209 + 75641500900 = 215547^2 + 275030^2 .

It is a cyclic number.

It is not a de Polignac number, because 122102010109 - 2³ = 122102010101 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 (122102010101) 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, 55049392 + ... + 55051609.

It is an arithmetic number, because the mean of its divisors is an integer number (30553028055).

Almost surely, 2^122102010109 is an apocalyptic number.

It is an amenable number.

122102010109 is a deficient number, since it is larger than the sum of its proper divisors (110102111).

122102010109 is a wasteful number, since it uses less digits than its factorization.

122102010109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110102110.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 122102010109 in words is "one hundred twenty-two billion, one hundred two million, ten thousand, one hundred nine".