261202100012 has 48 divisors (see below), whose sum is σ = 573807843840. Its totient is φ = 101441020032.

The previous prime is 261202100009. The next prime is 261202100039. The reversal of 261202100012 is 210001202162.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10661273 + ... + 10685744.

It is an arithmetic number, because the mean of its divisors is an integer number (11954330080).

Almost surely, 2^261202100012 is an apocalyptic number.

It is an amenable number.

261202100012 is an abundant number, since it is smaller than the sum of its proper divisors (312605743828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261202100012 is a wasteful number, since it uses less digits than its factorization.

261202100012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21347070 (or 21347068 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 261202100012 its reverse (210001202162), we get a palindrome (471203302174).

The spelling of 261202100012 in words is "two hundred sixty-one billion, two hundred two million, one hundred thousand, twelve".