20120320112217 has 24 divisors (see below), whose sum is σ = 29152104719904. Its totient is φ = 12337983650304.

The previous prime is 20120320112183. The next prime is 20120320112231. The reversal of 20120320112217 is 71221102302102.

It is a happy number.

It is not a de Polignac number, because 20120320112217 - 2²⁰ = 20120319063641 is a prime.

It is a super-2 number, since 2×20120320112217² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20120320112117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69971448 + ... + 70258409.

It is an arithmetic number, because the mean of its divisors is an integer number (1214671029996).

Almost surely, 2^{20120320112217} is an apocalyptic number.

It is an amenable number.

20120320112217 is a deficient number, since it is larger than the sum of its proper divisors (9031784607687).

20120320112217 is a wasteful number, since it uses less digits than its factorization.

20120320112217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140230169 (or 140230156 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

Adding to 20120320112217 its reverse (71221102302102), we get a palindrome (91341422414319).

The spelling of 20120320112217 in words is "twenty trillion, one hundred twenty billion, three hundred twenty million, one hundred twelve thousand, two hundred seventeen".