212110101 has 12 divisors (see below), whose sum is σ = 350150112. Its totient is φ = 121205736.

The previous prime is 212110079. The next prime is 212110109. The reversal of 212110101 is 101011212.

It is a happy number.

It is not a de Polignac number, because 212110101 - 2¹⁰ = 212109077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212110109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1683351 + ... + 1683476.

It is an arithmetic number, because the mean of its divisors is an integer number (29179176).

Almost surely, 2^212110101 is an apocalyptic number.

212110101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212110101 is a deficient number, since it is larger than the sum of its proper divisors (138040011).

212110101 is a wasteful number, since it uses less digits than its factorization.

212110101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366840 (or 3366837 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 212110101 is about 14564.0001716561. Note that the first 3 decimals coincide. The cubic root of 212110101 is about 596.3764016130.

Adding to 212110101 its reverse (101011212), we get a palindrome (313121313).

The spelling of 212110101 in words is "two hundred twelve million, one hundred ten thousand, one hundred one".