1210121012 has 12 divisors (see below), whose sum is σ = 2117991456. Its totient is φ = 604980600.

The previous prime is 1210120999. The next prime is 1210121021. The reversal of 1210121012 is 2101210121.

1210121012 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1210120984 and 1210121002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25703 + ... + 55505.

It is an arithmetic number, because the mean of its divisors is an integer number (176499288).

Almost surely, 2^1210121012 is an apocalyptic number.

It is an amenable number.

1210121012 is a deficient number, since it is larger than the sum of its proper divisors (907870444).

1210121012 is a wasteful number, since it uses less digits than its factorization.

1210121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39958 (or 39956 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1210121012 is about 34786.7936435654. The cubic root of 1210121012 is about 1065.6377591797.

Adding to 1210121012 its reverse (2101210121), we get a palindrome (3311331133).

The spelling of 1210121012 in words is "one billion, two hundred ten million, one hundred twenty-one thousand, twelve".