212011223130 has 48 divisors (see below), whose sum is σ = 629976207744. Its totient is φ = 48459708000.

The previous prime is 212011223119. The next prime is 212011223131. The reversal of 212011223130 is 31322110212.

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

It is not an unprimeable number, because it can be changed into a prime (212011223131) 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, 168262246 + ... + 168263505.

It is an arithmetic number, because the mean of its divisors is an integer number (13124504328).

Almost surely, 2^212011223130 is an apocalyptic number.

212011223130 is an abundant number, since it is smaller than the sum of its proper divisors (417964984614).

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

212011223130 is a wasteful number, since it uses less digits than its factorization.

212011223130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336525771 (or 336525768 counting only the distinct ones).

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

Adding to 212011223130 its reverse (31322110212), we get a palindrome (243333333342).

The spelling of 212011223130 in words is "two hundred twelve billion, eleven million, two hundred twenty-three thousand, one hundred thirty".