12120001172 has 6 divisors (see below), whose sum is σ = 21210002058. Its totient is φ = 6060000584.

The previous prime is 12120001121. The next prime is 12120001261. The reversal of 12120001172 is 27110002121.

It can be written as a sum of positive squares in only one way, i.e., 11897573776 + 222427396 = 109076^2 + 14914^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12120001172.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1515000143 + ... + 1515000150.

It is an arithmetic number, because the mean of its divisors is an integer number (3535000343).

Almost surely, 2^12120001172 is an apocalyptic number.

It is an amenable number.

12120001172 is a deficient number, since it is larger than the sum of its proper divisors (9090000886).

12120001172 is a wasteful number, since it uses less digits than its factorization.

12120001172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030000297 (or 3030000295 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 17.

Adding to 12120001172 its reverse (27110002121), we get a palindrome (39230003293).

The spelling of 12120001172 in words is "twelve billion, one hundred twenty million, one thousand, one hundred seventy-two".