7200121111 has 8 divisors (see below), whose sum is σ = 7405748240. Its totient is φ = 6996229632.

The previous prime is 7200121091. The next prime is 7200121127. The reversal of 7200121111 is 1111210027.

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 7200121111 - 2¹¹ = 7200119063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7200125111) 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, 425496 + ... + 442093.

It is an arithmetic number, because the mean of its divisors is an integer number (925718530).

Almost surely, 2^7200121111 is an apocalyptic number.

7200121111 is a deficient number, since it is larger than the sum of its proper divisors (205627129).

7200121111 is a wasteful number, since it uses less digits than its factorization.

7200121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867825.

The product of its (nonzero) digits is 28, while the sum is 16.

The square root of 7200121111 is about 84853.5273927961. The cubic root of 7200121111 is about 1930.9895961306.

Adding to 7200121111 its reverse (1111210027), we get a palindrome (8311331138).

The spelling of 7200121111 in words is "seven billion, two hundred million, one hundred twenty-one thousand, one hundred eleven".