212101002220020 has 96 divisors (see below), whose sum is σ = 609982735531008. Its totient is φ = 55027186486272.

The previous prime is 212101002219961. The next prime is 212101002220031. The reversal of 212101002220020 is 20022200101212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23819709 + ... + 31489371.

It is an arithmetic number, because the mean of its divisors is an integer number (6353986828448).

Almost surely, 2^{212101002220020} is an apocalyptic number.

212101002220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212101002220020 is an abundant number, since it is smaller than the sum of its proper divisors (397881733310988).

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

212101002220020 is a wasteful number, since it uses less digits than its factorization.

212101002220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7682169 (or 7682167 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 212101002220020 its reverse (20022200101212), we get a palindrome (232123202321232).

The spelling of 212101002220020 in words is "two hundred twelve trillion, one hundred one billion, two million, two hundred twenty thousand, twenty".