12200002145 has 16 divisors (see below), whose sum is σ = 15504583248. Its totient is φ = 9183866880.

The previous prime is 12200002117. The next prime is 12200002147. The reversal of 12200002145 is 54120000221.

It can be written as a sum of positive squares in 8 ways, for example, as 843263521 + 11356738624 = 29039^2 + 106568^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12200002145 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12200002147) 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, 456287 + ... + 482283.

It is an arithmetic number, because the mean of its divisors is an integer number (969036453).

Almost surely, 2^12200002145 is an apocalyptic number.

It is an amenable number.

12200002145 is a deficient number, since it is larger than the sum of its proper divisors (3304581103).

12200002145 is a wasteful number, since it uses less digits than its factorization.

12200002145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31540.

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 12200002145 its reverse (54120000221), we get a palindrome (66320002366).

It can be divided in two parts, 122000021 and 45, that multiplied together give a palindrome (5490000945).

The spelling of 12200002145 in words is "twelve billion, two hundred million, two thousand, one hundred forty-five".