1212120106 has 4 divisors (see below), whose sum is σ = 1818180162. Its totient is φ = 606060052.

The previous prime is 1212120097. The next prime is 1212120109. The reversal of 1212120106 is 6010212121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1081817881 + 130302225 = 32891^2 + 11415^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1212120106.

It is not an unprimeable number, because it can be changed into a prime (1212120109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303030025 + ... + 303030028.

Almost surely, 2^1212120106 is an apocalyptic number.

1212120106 is a deficient number, since it is larger than the sum of its proper divisors (606060056).

1212120106 is an equidigital number, since it uses as much as digits as its factorization.

1212120106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606060055.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1212120106 is about 34815.5153056794. The cubic root of 1212120106 is about 1066.2242399336.

Adding to 1212120106 its reverse (6010212121), we get a palindrome (7222332227).

The spelling of 1212120106 in words is "one billion, two hundred twelve million, one hundred twenty thousand, one hundred six".