212021101201 has 18 divisors (see below), whose sum is σ = 267068251782. Its totient is φ = 167752952640.

The previous prime is 212021101183. The next prime is 212021101219. The reversal of 212021101201 is 102101120212.

It is an interprime number because it is at equal distance from previous prime (212021101183) and next prime (212021101219).

It can be written as a sum of positive squares in 3 ways, for example, as 2440261201 + 209580840000 = 49399^2 + 457800^2 .

It is not a de Polignac number, because 212021101201 - 2¹⁷ = 212020970129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212021101001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12793380 + ... + 12809941.

It is an arithmetic number, because the mean of its divisors is an integer number (14837125099).

Almost surely, 2^212021101201 is an apocalyptic number.

It is an amenable number.

212021101201 is a deficient number, since it is larger than the sum of its proper divisors (55047150581).

212021101201 is a wasteful number, since it uses less digits than its factorization.

212021101201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25603361 (or 25603341 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 212021101201 its reverse (102101120212), we get a palindrome (314122221413).

The spelling of 212021101201 in words is "two hundred twelve billion, twenty-one million, one hundred one thousand, two hundred one".