213200121240 has 96 divisors (see below), whose sum is σ = 694709982720. Its totient is φ = 56704886784.

The previous prime is 213200121227. The next prime is 213200121257. The reversal of 213200121240 is 42121002312.

It is a happy number.

213200121240 is a `hidden beast` number, since 213 + 200 + 1 + 212 + 40 = 666.

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

It is a congruent number.

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, 635257 + ... + 911016.

It is an arithmetic number, because the mean of its divisors is an integer number (7236562320).

Almost surely, 2^213200121240 is an apocalyptic number.

213200121240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213200121240 is an abundant number, since it is smaller than the sum of its proper divisors (481509861480).

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

213200121240 is a wasteful number, since it uses less digits than its factorization.

213200121240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546673 (or 1546666 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 213200121240 its reverse (42121002312), we get a palindrome (255321123552).

The spelling of 213200121240 in words is "two hundred thirteen billion, two hundred million, one hundred twenty-one thousand, two hundred forty".