212011001212005 has 24 divisors (see below), whose sum is σ = 367513339998168. Its totient is φ = 113064040267776.

The previous prime is 212011001211979. The next prime is 212011001212007. The reversal of 212011001212005 is 500212100110212.

It can be written as a sum of positive squares in 4 ways, for example, as 75503604296961 + 136507396915044 = 8689281^2 + 11683638^2 .

It is not a de Polignac number, because 212011001212005 - 2³⁰ = 212009927470181 is a prime.

It is a super-2 number, since 2×212011001212005² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212011001212007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 176346592 + ... + 177544761.

It is an arithmetic number, because the mean of its divisors is an integer number (15313055833257).

Almost surely, 2^{212011001212005} is an apocalyptic number.

It is an amenable number.

212011001212005 is a deficient number, since it is larger than the sum of its proper divisors (155502338786163).

212011001212005 is a wasteful number, since it uses less digits than its factorization.

212011001212005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353904677 (or 353904674 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 212011001212005 its reverse (500212100110212), we get a palindrome (712223101322217).

The spelling of 212011001212005 in words is "two hundred twelve trillion, eleven billion, one million, two hundred twelve thousand, five".