212141220 has 24 divisors (see below), whose sum is σ = 593995584. Its totient is φ = 56570976.

The previous prime is 212141219. The next prime is 212141227. The reversal of 212141220 is 22141212.

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

It is a self number, because there is not a number n which added to its sum of digits gives 212141220.

It is not an unprimeable number, because it can be changed into a prime (212141227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1767784 + ... + 1767903.

It is an arithmetic number, because the mean of its divisors is an integer number (24749816).

Almost surely, 2^212141220 is an apocalyptic number.

212141220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212141220 is an abundant number, since it is smaller than the sum of its proper divisors (381854364).

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

212141220 is a wasteful number, since it uses less digits than its factorization.

212141220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3535699 (or 3535697 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 212141220 is about 14565.0684859358. The cubic root of 212141220 is about 596.4055652873.

Adding to 212141220 its reverse (22141212), we get a palindrome (234282432).

The spelling of 212141220 in words is "two hundred twelve million, one hundred forty-one thousand, two hundred twenty".