1212021100113 has 8 divisors (see below), whose sum is σ = 1622316181728. Its totient is φ = 804870042624.

The previous prime is 1212021100111. The next prime is 1212021100153. The reversal of 1212021100113 is 3110011202121.

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

It is not a de Polignac number, because 1212021100113 - 2¹ = 1212021100111 is a prime.

It is a super-2 number, since 2×1212021100113² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1212021100092 and 1212021100101.

It is not an unprimeable number, because it can be changed into a prime (1212021100111) 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 7 ways as a sum of consecutive naturals, for example, 786005131 + ... + 786006672.

It is an arithmetic number, because the mean of its divisors is an integer number (202789522716).

Almost surely, 2^{1212021100113} is an apocalyptic number.

It is an amenable number.

1212021100113 is a deficient number, since it is larger than the sum of its proper divisors (410295081615).

1212021100113 is a wasteful number, since it uses less digits than its factorization.

1212021100113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572012063.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1212021100113 its reverse (3110011202121), we get a palindrome (4322032302234).

The spelling of 1212021100113 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred thousand, one hundred thirteen".