212100022201020 has 192 divisors, whose sum is σ = 622881007128576. Its totient is φ = 53867742888960.

The previous prime is 212100022200973. The next prime is 212100022201033. The reversal of 212100022201020 is 20102220001212.

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 63 ways as a sum of consecutive naturals, for example, 48620217 + ... + 52802703.

It is an arithmetic number, because the mean of its divisors is an integer number (3244171912128).

Almost surely, 2^{212100022201020} is an apocalyptic number.

212100022201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212100022201020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311440503564288).

212100022201020 is an abundant number, since it is smaller than the sum of its proper divisors (410780984927556).

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

212100022201020 is a wasteful number, since it uses less digits than its factorization.

212100022201020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4183020 (or 4183018 counting only the distinct ones).

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

Adding to 212100022201020 its reverse (20102220001212), we get a palindrome (232202242202232).

The spelling of 212100022201020 in words is "two hundred twelve trillion, one hundred billion, twenty-two million, two hundred one thousand, twenty".