212202011020221 has 24 divisors (see below), whose sum is σ = 314894951768280. Its totient is φ = 137602233876096.

The previous prime is 212202011020193. The next prime is 212202011020231. The reversal of 212202011020221 is 122020110202212.

It is a happy number.

212202011020221 is a `hidden beast` number, since 2 + 1 + 220 + 201 + 1 + 0 + 20 + 221 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 163470288802500 + 48731722217721 = 12785550^2 + 6980811^2 .

It is not a de Polignac number, because 212202011020221 - 2¹³ = 212202011012029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212202011020194 and 212202011020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212202011020231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96863766 + ... + 99030263.

It is an arithmetic number, because the mean of its divisors is an integer number (13120622990345).

Almost surely, 2^{212202011020221} is an apocalyptic number.

It is an amenable number.

212202011020221 is a deficient number, since it is larger than the sum of its proper divisors (102692940748059).

212202011020221 is a wasteful number, since it uses less digits than its factorization.

212202011020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195897325 (or 195897322 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212202011020221 its reverse (122020110202212), we get a palindrome (334222121222433).

It can be divided in two parts, 2 and 12202011020221, that multiplied together give a palindrome (24404022040442).

The spelling of 212202011020221 in words is "two hundred twelve trillion, two hundred two billion, eleven million, twenty thousand, two hundred twenty-one".