1212211010101 has 64 divisors (see below), whose sum is σ = 1647716761600. Its totient is φ = 864904262400.

The previous prime is 1212211010069. The next prime is 1212211010117. The reversal of 1212211010101 is 1010101122121.

It is a happy number.

It is not a de Polignac number, because 1212211010101 - 2⁵ = 1212211010069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212211010161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3084160 + ... + 3454918.

It is an arithmetic number, because the mean of its divisors is an integer number (25745574400).

Almost surely, 2^{1212211010101} is an apocalyptic number.

It is an amenable number.

1212211010101 is a deficient number, since it is larger than the sum of its proper divisors (435505751499).

1212211010101 is a wasteful number, since it uses less digits than its factorization.

1212211010101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370890.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1212211010101 its reverse (1010101122121), we get a palindrome (2222312132222).

The spelling of 1212211010101 in words is "one trillion, two hundred twelve billion, two hundred eleven million, ten thousand, one hundred one".