1201661116 has 24 divisors (see below), whose sum is σ = 2242643760. Its totient is φ = 561414912.

The previous prime is 1201661107. The next prime is 1201661141. The reversal of 1201661116 is 6111661021.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 54115 + ... + 73018.

It is an arithmetic number, because the mean of its divisors is an integer number (93443490).

Almost surely, 2^1201661116 is an apocalyptic number.

It is an amenable number.

1201661116 is a deficient number, since it is larger than the sum of its proper divisors (1040982644).

1201661116 is a wasteful number, since it uses less digits than its factorization.

1201661116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127293 (or 127291 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 1201661116 is about 34664.9840040350. The cubic root of 1201661116 is about 1063.1486762041.

The spelling of 1201661116 in words is "one billion, two hundred one million, six hundred sixty-one thousand, one hundred sixteen".