212101101020 has 24 divisors (see below), whose sum is σ = 445454423568. Its totient is φ = 84832419200.

The previous prime is 212101100999. The next prime is 212101101053. The reversal of 212101101020 is 20101101212.

It is a junction number, because it is equal to n+sod(n) for n = 212101100992 and 212101101010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282161 + ... + 709800.

It is an arithmetic number, because the mean of its divisors is an integer number (18560600982).

Almost surely, 2^212101101020 is an apocalyptic number.

212101101020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212101101020 is an abundant number, since it is smaller than the sum of its proper divisors (233353322548).

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

212101101020 is a wasteful number, since it uses less digits than its factorization.

212101101020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002661 (or 1002659 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 212101101020 its reverse (20101101212), we get a palindrome (232202202232).

The spelling of 212101101020 in words is "two hundred twelve billion, one hundred one million, one hundred one thousand, twenty".