208121011012 has 12 divisors (see below), whose sum is σ = 364412892816. Its totient is φ = 104003041640.

The previous prime is 208121011009. The next prime is 208121011019. The reversal of 208121011012 is 210110121802.

208121011012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (208121011019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14357818 + ... + 14372305.

It is an arithmetic number, because the mean of its divisors is an integer number (30367741068).

Almost surely, 2^208121011012 is an apocalyptic number.

It is an amenable number.

208121011012 is a deficient number, since it is larger than the sum of its proper divisors (156291881804).

208121011012 is a wasteful number, since it uses less digits than its factorization.

208121011012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28731938 (or 28731936 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 208121011012 its reverse (210110121802), we get a palindrome (418231132814).

The spelling of 208121011012 in words is "two hundred eight billion, one hundred twenty-one million, eleven thousand, twelve".