5661131212 has 12 divisors (see below), whose sum is σ = 10807614216. Its totient is φ = 2573241440.

The previous prime is 5661131183. The next prime is 5661131221. The reversal of 5661131212 is 2121311665.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64330993 + ... + 64331080.

It is an arithmetic number, because the mean of its divisors is an integer number (900634518).

Almost surely, 2^5661131212 is an apocalyptic number.

It is an amenable number.

5661131212 is a deficient number, since it is larger than the sum of its proper divisors (5146483004).

5661131212 is a wasteful number, since it uses less digits than its factorization.

5661131212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128662088 (or 128662086 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 5661131212 is about 75240.4891796963. The cubic root of 5661131212 is about 1782.2463760812.

Adding to 5661131212 its reverse (2121311665), we get a palindrome (7782442877).

The spelling of 5661131212 in words is "five billion, six hundred sixty-one million, one hundred thirty-one thousand, two hundred twelve".