1212100103213 has 16 divisors (see below), whose sum is σ = 1246500616704. Its totient is φ = 1177787096640.

The previous prime is 1212100103171. The next prime is 1212100103231. The reversal of 1212100103213 is 3123010012121.

It is a cyclic number.

It is not a de Polignac number, because 1212100103213 - 2²⁰ = 1212099054637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212100103191 and 1212100103200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212100108213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96644723 + ... + 96657263.

It is an arithmetic number, because the mean of its divisors is an integer number (77906288544).

Almost surely, 2^{1212100103213} is an apocalyptic number.

It is an amenable number.

1212100103213 is a deficient number, since it is larger than the sum of its proper divisors (34400513491).

1212100103213 is a wasteful number, since it uses less digits than its factorization.

1212100103213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15812.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1212100103213 its reverse (3123010012121), we get a palindrome (4335110115334).

The spelling of 1212100103213 in words is "one trillion, two hundred twelve billion, one hundred million, one hundred three thousand, two hundred thirteen".