212011101 has 40 divisors (see below), whose sum is σ = 335179680. Its totient is φ = 133179552.

The previous prime is 212011087. The next prime is 212011117. The reversal of 212011101 is 101110212.

It is a happy number.

It is not a de Polignac number, because 212011101 - 2⁵ = 212011069 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 (212011601) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 533835 + ... + 534231.

It is an arithmetic number, because the mean of its divisors is an integer number (8379492).

Almost surely, 2^212011101 is an apocalyptic number.

It is an amenable number.

212011101 is a deficient number, since it is larger than the sum of its proper divisors (123168579).

212011101 is a wasteful number, since it uses less digits than its factorization.

212011101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775 (or 766 counting only the distinct ones).

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

The square root of 212011101 is about 14560.6009834759. The cubic root of 212011101 is about 596.2836031851.

Adding to 212011101 its reverse (101110212), we get a palindrome (313121313).

The spelling of 212011101 in words is "two hundred twelve million, eleven thousand, one hundred one".