2129812812813 has 32 divisors (see below), whose sum is σ = 3352982413312. Its totient is φ = 1176770462400.

The previous prime is 2129812812769. The next prime is 2129812812901. The reversal of 2129812812813 is 3182182189212.

It is a happy number.

It is not a de Polignac number, because 2129812812813 - 2⁶ = 2129812812749 is a prime.

It is a super-2 number, since 2×2129812812813² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129812812313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 634606 + ... + 2159247.

It is an arithmetic number, because the mean of its divisors is an integer number (104780700416).

Almost surely, 2^{2129812812813} is an apocalyptic number.

It is an amenable number.

2129812812813 is a deficient number, since it is larger than the sum of its proper divisors (1223169600499).

2129812812813 is a wasteful number, since it uses less digits than its factorization.

2129812812813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2795065.

The product of its digits is 221184, while the sum is 48.

The spelling of 2129812812813 in words is "two trillion, one hundred twenty-nine billion, eight hundred twelve million, eight hundred twelve thousand, eight hundred thirteen".