211212036 has 120 divisors (see below), whose sum is σ = 658627200. Its totient is φ = 57708288.

The previous prime is 211212019. The next prime is 211212091. The reversal of 211212036 is 630212112.

It is a super-2 number, since 2×211212036² = 89221048302530592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 50140 + ... + 54188.

It is an arithmetic number, because the mean of its divisors is an integer number (5488560).

Almost surely, 2^211212036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211212036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329313600).

211212036 is an abundant number, since it is smaller than the sum of its proper divisors (447415164).

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

211212036 is a wasteful number, since it uses less digits than its factorization.

211212036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4095 (or 4084 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 211212036 is about 14533.1357937645. The cubic root of 211212036 is about 595.5335336331.

Adding to 211212036 its reverse (630212112), we get a palindrome (841424148).

The spelling of 211212036 in words is "two hundred eleven million, two hundred twelve thousand, thirty-six".