213111201000020 has 12 divisors (see below), whose sum is σ = 447533522100084. Its totient is φ = 85244480400000.

The previous prime is 213111201000013. The next prime is 213111201000037. The reversal of 213111201000020 is 20000102111312.

213111201000020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 55174976016196 + 157936224983824 = 7427986^2 + 12567268^2 .

It is a junction number, because it is equal to n+sod(n) for n = 213111200999959 and 213111201000004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5327780024981 + ... + 5327780025020.

It is an arithmetic number, because the mean of its divisors is an integer number (37294460175007).

Almost surely, 2^{213111201000020} is an apocalyptic number.

213111201000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213111201000020 is an abundant number, since it is smaller than the sum of its proper divisors (234422321100064).

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

213111201000020 is a wasteful number, since it uses less digits than its factorization.

213111201000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10655560050010 (or 10655560050008 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 213111201000020 its reverse (20000102111312), we get a palindrome (233111303111332).

The spelling of 213111201000020 in words is "two hundred thirteen trillion, one hundred eleven billion, two hundred one million, twenty", and thus it is an aban number.