1216101 has 8 divisors (see below), whose sum is σ = 1661184. Its totient is φ = 790880.

The previous prime is 1216091. The next prime is 1216109. The reversal of 1216101 is 1016121.

It is a happy number.

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 1216101 - 2⁵ = 1216069 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216109) 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, 4821 + ... + 5066.

It is an arithmetic number, because the mean of its divisors is an integer number (207648).

2^1216101 is an apocalyptic number.

It is an amenable number.

1216101 is a deficient number, since it is larger than the sum of its proper divisors (445083).

1216101 is an equidigital number, since it uses as much as digits as its factorization.

1216101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9931.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1216101 is about 1102.7696949046. The cubic root of 1216101 is about 106.7390210049.

The spelling of 1216101 in words is "one million, two hundred sixteen thousand, one hundred one".