1212010101 has 16 divisors (see below), whose sum is σ = 1822372800. Its totient is φ = 795945744.

The previous prime is 1212010067. The next prime is 1212010109. The reversal of 1212010101 is 1010102121.

It is a happy number.

It is not a de Polignac number, because 1212010101 - 2²⁹ = 675139189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

1212010101 is a modest number, since divided by 10101 gives 1212 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212010109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 333186 + ... + 336803.

It is an arithmetic number, because the mean of its divisors is an integer number (113898300).

Almost surely, 2^1212010101 is an apocalyptic number.

It is an amenable number.

1212010101 is a deficient number, since it is larger than the sum of its proper divisors (610362699).

1212010101 is an equidigital number, since it uses as much as digits as its factorization.

1212010101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670065 (or 670059 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1212010101 is about 34813.9354425782. The cubic root of 1212010101 is about 1066.1919841790.

Adding to 1212010101 its reverse (1010102121), we get a palindrome (2222112222).

The spelling of 1212010101 in words is "one billion, two hundred twelve million, ten thousand, one hundred one".