1206110721 has 8 divisors (see below), whose sum is σ = 1608600384. Its totient is φ = 803847440.

The previous prime is 1206110699. The next prime is 1206110749. The reversal of 1206110721 is 1270116021.

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 1206110721 - 2⁶ = 1206110657 is a prime.

It is a super-2 number, since 2×1206110721² = 2909406142622279682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1206110761) 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, 43746 + ... + 65771.

It is an arithmetic number, because the mean of its divisors is an integer number (201075048).

Almost surely, 2^1206110721 is an apocalyptic number.

It is an amenable number.

1206110721 is a deficient number, since it is larger than the sum of its proper divisors (402489663).

1206110721 is a wasteful number, since it uses less digits than its factorization.

1206110721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113191.

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 1206110721 is about 34729.1048113826. The cubic root of 1206110721 is about 1064.4592966026.

Adding to 1206110721 its reverse (1270116021), we get a palindrome (2476226742).

The spelling of 1206110721 in words is "one billion, two hundred six million, one hundred ten thousand, seven hundred twenty-one".