212112221010 has 128 divisors (see below), whose sum is σ = 548845977600. Its totient is φ = 52356015360.

The previous prime is 212112220963. The next prime is 212112221029. The reversal of 212112221010 is 10122211212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1977951 + ... + 2082429.

It is an arithmetic number, because the mean of its divisors is an integer number (4287859200).

Almost surely, 2^212112221010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212112221010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274422988800).

212112221010 is an abundant number, since it is smaller than the sum of its proper divisors (336733756590).

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

212112221010 is a wasteful number, since it uses less digits than its factorization.

212112221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104616.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212112221010 its reverse (10122211212), we get a palindrome (222234432222).

The spelling of 212112221010 in words is "two hundred twelve billion, one hundred twelve million, two hundred twenty-one thousand, ten".