213535123021220 has 288 divisors, whose sum is σ = 627559321939200. Its totient is φ = 59318170813440.

The previous prime is 213535123021201. The next prime is 213535123021223. The reversal of 213535123021220 is 22120321535312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (213535123021223) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10331630 + ... + 23104389.

It is an arithmetic number, because the mean of its divisors is an integer number (2179025423400).

Almost surely, 2^{213535123021220} is an apocalyptic number.

213535123021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213535123021220 is an abundant number, since it is smaller than the sum of its proper divisors (414024198917980).

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

213535123021220 is a wasteful number, since it uses less digits than its factorization.

213535123021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33436099 (or 33436086 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 213535123021220 its reverse (22120321535312), we get a palindrome (235655444556532).

The spelling of 213535123021220 in words is "two hundred thirteen trillion, five hundred thirty-five billion, one hundred twenty-three million, twenty-one thousand, two hundred twenty".