7211172123 has 8 divisors (see below), whose sum is σ = 10683218000. Its totient is φ = 4807448064.

The previous prime is 7211172121. The next prime is 7211172193. The reversal of 7211172123 is 3212711127.

It is not a de Polignac number, because 7211172123 - 2¹ = 7211172121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 267080449 = 7211172123 / (7 + 2 + 1 + 1 + 1 + 7 + 2 + 1 + 2 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7211172121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133540198 + ... + 133540251.

It is an arithmetic number, because the mean of its divisors is an integer number (1335402250).

Almost surely, 2^7211172123 is an apocalyptic number.

7211172123 is a deficient number, since it is larger than the sum of its proper divisors (3472045877).

7211172123 is a wasteful number, since it uses less digits than its factorization.

7211172123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267080458 (or 267080452 counting only the distinct ones).

The product of its digits is 1176, while the sum is 27.

The square root of 7211172123 is about 84918.6205905395. The cubic root of 7211172123 is about 1931.9770091975.

The spelling of 7211172123 in words is "seven billion, two hundred eleven million, one hundred seventy-two thousand, one hundred twenty-three".