212115511212 has 48 divisors (see below), whose sum is σ = 539965574400. Its totient is φ = 64273239360.

The previous prime is 212115511193. The next prime is 212115511219.

212115511212 is nontrivially palindromic in base 10.

212115511212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (212115511219) 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 15 ways as a sum of consecutive naturals, for example, 2422614 + ... + 2508642.

It is an arithmetic number, because the mean of its divisors is an integer number (11249282800).

Almost surely, 2^212115511212 is an apocalyptic number.

212115511212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

212115511212 is an abundant number, since it is smaller than the sum of its proper divisors (327850063188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212115511212 is a wasteful number, since it uses less digits than its factorization.

212115511212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104726 (or 104724 counting only the distinct ones).

The product of its digits is 400, while the sum is 24.

It can be divided in two parts, 212115 and 511212, that added together give a palindrome (723327).

The spelling of 212115511212 in words is "two hundred twelve billion, one hundred fifteen million, five hundred eleven thousand, two hundred twelve".