7212117045 has 16 divisors (see below), whose sum is σ = 13187871360. Its totient is φ = 3296967744.

The previous prime is 7212117037. The next prime is 7212117049. The reversal of 7212117045 is 5407112127.

It is not a de Polignac number, because 7212117045 - 2³ = 7212117037 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7212117049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34343310 + ... + 34343519.

It is an arithmetic number, because the mean of its divisors is an integer number (824241960).

Almost surely, 2^7212117045 is an apocalyptic number.

It is an amenable number.

7212117045 is a deficient number, since it is larger than the sum of its proper divisors (5975754315).

7212117045 is a wasteful number, since it uses less digits than its factorization.

7212117045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68686844.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 7212117045 is about 84924.1840997015. The cubic root of 7212117045 is about 1932.0613915890.

The spelling of 7212117045 in words is "seven billion, two hundred twelve million, one hundred seventeen thousand, forty-five".