1212101101 has 4 divisors (see below), whose sum is σ = 1224102204. Its totient is φ = 1200100000.

The previous prime is 1212101053. The next prime is 1212101119. The reversal of 1212101101 is 1011012121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 856967076 + 355134025 = 29274^2 + 18845^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212101101 - 2¹⁷ = 1211970029 is a prime.

It is a Duffinian number.

1212101101 is a modest number, since divided by 101101 gives 1212 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212101131) 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 3 ways as a sum of consecutive naturals, for example, 6000400 + ... + 6000601.

It is an arithmetic number, because the mean of its divisors is an integer number (306025551).

Almost surely, 2^1212101101 is an apocalyptic number.

It is an amenable number.

1212101101 is a deficient number, since it is larger than the sum of its proper divisors (12001103).

1212101101 is a wasteful number, since it uses less digits than its factorization.

1212101101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12001102.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1212101101 is about 34815.2423659523. The cubic root of 1212101101 is about 1066.2186674117.

Adding to 1212101101 its reverse (1011012121), we get a palindrome (2223113222).

The spelling of 1212101101 in words is "one billion, two hundred twelve million, one hundred one thousand, one hundred one".