212111010 has 48 divisors (see below), whose sum is σ = 566402616. Its totient is φ = 55033344.

The previous prime is 212110981. The next prime is 212111027. The reversal of 212111010 is 10111212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 158835609 + 53275401 = 12603^2 + 7299^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 212110983 and 212111001.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28519 + ... + 35178.

Almost surely, 2^212111010 is an apocalyptic number.

212111010 is an abundant number, since it is smaller than the sum of its proper divisors (354291606).

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

212111010 is a wasteful number, since it uses less digits than its factorization.

212111010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63747 (or 63744 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 212111010 is about 14564.0313787083. The cubic root of 212111010 is about 596.3772535375.

Adding to 212111010 its reverse (10111212), we get a palindrome (222222222).

It can be divided in two parts, 2121 and 11010, that added together give a palindrome (13131).

The spelling of 212111010 in words is "two hundred twelve million, one hundred eleven thousand, ten".