212202111202101 has 24 divisors (see below), whose sum is σ = 309553202176920. Its totient is φ = 140065478016000.

The previous prime is 212202111202031. The next prime is 212202111202157. The reversal of 212202111202101 is 101202111202212.

212202111202101 is a `hidden beast` number, since 2 + 1 + 220 + 211 + 1 + 20 + 210 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 155358126347076 + 56843984855025 = 12464274^2 + 7539495^2 .

It is not a de Polignac number, because 212202111202101 - 2⁷ = 212202111201973 is a prime.

It is a super-2 number, since 2×212202111202101² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212202111202171) 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, 66255121 + ... + 69384041.

It is an arithmetic number, because the mean of its divisors is an integer number (12898050090705).

Almost surely, 2^{212202111202101} is an apocalyptic number.

It is an amenable number.

212202111202101 is a deficient number, since it is larger than the sum of its proper divisors (97351090974819).

212202111202101 is a wasteful number, since it uses less digits than its factorization.

212202111202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3203637 (or 3203634 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212202111202101 its reverse (101202111202212), we get a palindrome (313404222404313).

It can be divided in two parts, 212202111 and 202101, that added together give a palindrome (212404212).

The spelling of 212202111202101 in words is "two hundred twelve trillion, two hundred two billion, one hundred eleven million, two hundred two thousand, one hundred one".