208149884121 has 32 divisors (see below), whose sum is σ = 301741158400. Its totient is φ = 127147631040.

The previous prime is 208149884077. The next prime is 208149884143. The reversal of 208149884121 is 121488941802.

It is not a de Polignac number, because 208149884121 - 2¹³ = 208149875929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (208149884171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3053235 + ... + 3120663.

It is an arithmetic number, because the mean of its divisors is an integer number (9429411200).

Almost surely, 2^208149884121 is an apocalyptic number.

It is an amenable number.

208149884121 is a deficient number, since it is larger than the sum of its proper divisors (93591274279).

208149884121 is a wasteful number, since it uses less digits than its factorization.

208149884121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69229.

The product of its (nonzero) digits is 294912, while the sum is 48.

The spelling of 208149884121 in words is "two hundred eight billion, one hundred forty-nine million, eight hundred eighty-four thousand, one hundred twenty-one".