212011102221020 has 24 divisors (see below), whose sum is σ = 445223590081200. Its totient is φ = 84804388428032.

The previous prime is 212011102220941. The next prime is 212011102221059. The reversal of 212011102221020 is 20122201110212.

It is a self number, because there is not a number n which added to its sum of digits gives 212011102221020.

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, 56001671 + ... + 59667489.

It is an arithmetic number, because the mean of its divisors is an integer number (18550982920050).

Almost surely, 2^{212011102221020} is an apocalyptic number.

212011102221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212011102221020 is an abundant number, since it is smaller than the sum of its proper divisors (233212487860180).

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

212011102221020 is a wasteful number, since it uses less digits than its factorization.

212011102221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6557557 (or 6557555 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212011102221020 its reverse (20122201110212), we get a palindrome (232133303331232).

The spelling of 212011102221020 in words is "two hundred twelve trillion, eleven billion, one hundred two million, two hundred twenty-one thousand, twenty".