212120011000020 has 48 divisors (see below), whose sum is σ = 601454208418560. Its totient is φ = 55849319350656.

The previous prime is 212120011000019. The next prime is 212120011000061. The reversal of 212120011000020 is 20000110021212.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 22375523847 + ... + 22375533326.

It is an arithmetic number, because the mean of its divisors is an integer number (12530296008720).

Almost surely, 2^{212120011000020} is an apocalyptic number.

212120011000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212120011000020 is an abundant number, since it is smaller than the sum of its proper divisors (389334197418540).

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

212120011000020 is a wasteful number, since it uses less digits than its factorization.

212120011000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44751057264 (or 44751057262 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 212120011000020 its reverse (20000110021212), we get a palindrome (232120121021232).

The spelling of 212120011000020 in words is "two hundred twelve trillion, one hundred twenty billion, eleven million, twenty", and thus it is an aban number.