209120792102 has 4 divisors (see below), whose sum is σ = 313681188156. Its totient is φ = 104560396050.

The previous prime is 209120792077. The next prime is 209120792107. The reversal of 209120792102 is 201297021902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 201297021902 = 2 ⋅100648510951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209120792107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52280198024 + ... + 52280198027.

It is an arithmetic number, because the mean of its divisors is an integer number (78420297039).

Almost surely, 2^209120792102 is an apocalyptic number.

209120792102 is a deficient number, since it is larger than the sum of its proper divisors (104560396054).

209120792102 is a wasteful number, since it uses less digits than its factorization.

209120792102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104560396053.

The product of its (nonzero) digits is 9072, while the sum is 35.

The spelling of 209120792102 in words is "two hundred nine billion, one hundred twenty million, seven hundred ninety-two thousand, one hundred two".