213244221420 has 72 divisors (see below), whose sum is σ = 661883638416. Its totient is φ = 55542678912.

The previous prime is 213244221419. The next prime is 213244221439. The reversal of 213244221420 is 24122442312.

It is a happy number.

213244221420 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 442 + 214 + 2 + 0 = 666.

213244221420 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 13767727 + ... + 13783206.

Almost surely, 2^213244221420 is an apocalyptic number.

213244221420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213244221420 is an abundant number, since it is smaller than the sum of its proper divisors (448639416996).

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

213244221420 is a wasteful number, since it uses less digits than its factorization.

213244221420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27550991 (or 27550986 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 213244221420 its reverse (24122442312), we get a palindrome (237366663732).

The spelling of 213244221420 in words is "two hundred thirteen billion, two hundred forty-four million, two hundred twenty-one thousand, four hundred twenty".