1121650661 has 8 divisors (see below), whose sum is σ = 1165190400. Its totient is φ = 1078435120.

The previous prime is 1121650639. The next prime is 1121650669. The reversal of 1121650661 is 1660561211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121650661 - 2²⁶ = 1054541797 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121650669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73985 + ... + 87846.

It is an arithmetic number, because the mean of its divisors is an integer number (145648800).

Almost surely, 2^1121650661 is an apocalyptic number.

It is an amenable number.

1121650661 is a deficient number, since it is larger than the sum of its proper divisors (43539739).

1121650661 is a wasteful number, since it uses less digits than its factorization.

1121650661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162099.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1121650661 is about 33491.0534471521. The cubic root of 1121650661 is about 1039.0087513386.

The spelling of 1121650661 in words is "one billion, one hundred twenty-one million, six hundred fifty thousand, six hundred sixty-one".