213442142021020 has 48 divisors (see below), whose sum is σ = 499380299808768. Its totient is φ = 75963934487360.

The previous prime is 213442142020999. The next prime is 213442142021051. The reversal of 213442142021020 is 20120241244312.

It is a self number, because there is not a number n which added to its sum of digits gives 213442142021020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10321176412 + ... + 10321197091.

It is an arithmetic number, because the mean of its divisors is an integer number (10403756246016).

Almost surely, 2^{213442142021020} is an apocalyptic number.

213442142021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213442142021020 is an abundant number, since it is smaller than the sum of its proper divisors (285938157787748).

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

213442142021020 is a wasteful number, since it uses less digits than its factorization.

213442142021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20642373570 (or 20642373568 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 213442142021020 its reverse (20120241244312), we get a palindrome (233562383265332).

The spelling of 213442142021020 in words is "two hundred thirteen trillion, four hundred forty-two billion, one hundred forty-two million, twenty-one thousand, twenty".