561101212 has 24 divisors (see below), whose sum is σ = 1134816480. Its totient is φ = 237768960.

The previous prime is 561101207. The next prime is 561101221. The reversal of 561101212 is 212101165.

561101212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 561101212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110089 + ... + 115072.

It is an arithmetic number, because the mean of its divisors is an integer number (47284020).

Almost surely, 2^561101212 is an apocalyptic number.

It is an amenable number.

561101212 is an abundant number, since it is smaller than the sum of its proper divisors (573715268).

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

561101212 is a wasteful number, since it uses less digits than its factorization.

561101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225261 (or 225259 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 561101212 is about 23687.5750552901. The cubic root of 561101212 is about 824.7969929643.

Adding to 561101212 its reverse (212101165), we get a palindrome (773202377).

The spelling of 561101212 in words is "five hundred sixty-one million, one hundred one thousand, two hundred twelve".