7211128133 has 8 divisors (see below), whose sum is σ = 7867700640. Its totient is φ = 6554724880.

The previous prime is 7211128129. The next prime is 7211128157. The reversal of 7211128133 is 3318211127.

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

It is not a de Polignac number, because 7211128133 - 2² = 7211128129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7211128096 and 7211128105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7211128123) 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, 56903 + ... + 132891.

It is an arithmetic number, because the mean of its divisors is an integer number (983462580).

Almost surely, 2^7211128133 is an apocalyptic number.

It is an amenable number.

7211128133 is a deficient number, since it is larger than the sum of its proper divisors (656572507).

7211128133 is a wasteful number, since it uses less digits than its factorization.

7211128133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84627.

The product of its digits is 2016, while the sum is 29.

The square root of 7211128133 is about 84918.3615774586. The cubic root of 7211128133 is about 1931.9730806710.

The spelling of 7211128133 in words is "seven billion, two hundred eleven million, one hundred twenty-eight thousand, one hundred thirty-three".