1212101211 has 8 divisors (see below), whose sum is σ = 1628472384. Its totient is φ = 801898760.

The previous prime is 1212101201. The next prime is 1212101237. The reversal of 1212101211 is 1121012121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1212101211 - 2⁹ = 1212100699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212101201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1541721 + ... + 1542506.

It is an arithmetic number, because the mean of its divisors is an integer number (203559048).

Almost surely, 2^1212101211 is an apocalyptic number.

1212101211 is a deficient number, since it is larger than the sum of its proper divisors (416371173).

1212101211 is a wasteful number, since it uses less digits than its factorization.

1212101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3084361.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1212101211 is about 34815.2439457201. The cubic root of 1212101211 is about 1066.2186996653.

Adding to 1212101211 its reverse (1121012121), we get a palindrome (2333113332).

It can be divided in two parts, 1 and 212101211, that added together give a palindrome (212101212).

The spelling of 1212101211 in words is "one billion, two hundred twelve million, one hundred one thousand, two hundred eleven".