7220217123 has 20 divisors (see below), whose sum is σ = 12326579760. Its totient is φ = 4125838032.

The previous prime is 7220217079. The next prime is 7220217139. The reversal of 7220217123 is 3217120227.

It is not a de Polignac number, because 7220217123 - 2¹⁰ = 7220216099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (7220217023) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6366468 + ... + 6367601.

It is an arithmetic number, because the mean of its divisors is an integer number (616328988).

Almost surely, 2^7220217123 is an apocalyptic number.

7220217123 is a deficient number, since it is larger than the sum of its proper divisors (5106362637).

7220217123 is a wasteful number, since it uses less digits than its factorization.

7220217123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12734088 (or 12734079 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 7220217123 is about 84971.8607716696. The cubic root of 7220217123 is about 1932.7844336878.

The spelling of 7220217123 in words is "seven billion, two hundred twenty million, two hundred seventeen thousand, one hundred twenty-three".