212102021000020 has 24 divisors (see below), whose sum is σ = 459782445523968. Its totient is φ = 82104008128800.

The previous prime is 212102021000011. The next prime is 212102021000029. The reversal of 212102021000020 is 20000120201212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (212102021000011) and next prime (212102021000029).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212102021000029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171050016316 + ... + 171050017555.

It is an arithmetic number, because the mean of its divisors is an integer number (19157601896832).

Almost surely, 2^{212102021000020} is an apocalyptic number.

212102021000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212102021000020 is an abundant number, since it is smaller than the sum of its proper divisors (247680424523948).

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

212102021000020 is a wasteful number, since it uses less digits than its factorization.

212102021000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342100033911 (or 342100033909 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 212102021000020 its reverse (20000120201212), we get a palindrome (232102141201232).

The spelling of 212102021000020 in words is "two hundred twelve trillion, one hundred two billion, twenty-one million, twenty", and thus it is an aban number.