212101011 has 10 divisors (see below), whose sum is σ = 316842372. Its totient is φ = 141400620.

The previous prime is 212100961. The next prime is 212101013. The reversal of 212101011 is 110101212.

It is a happy number.

212101011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212101011 - 2⁶ = 212100947 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 212100984 and 212101002.

It is not an unprimeable number, because it can be changed into a prime (212101013) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1309185 + ... + 1309346.

Almost surely, 2^212101011 is an apocalyptic number.

212101011 is a deficient number, since it is larger than the sum of its proper divisors (104741361).

212101011 is an equidigital number, since it uses as much as digits as its factorization.

212101011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618543 (or 2618534 counting only the distinct ones).

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

The square root of 212101011 is about 14563.6880974566. The cubic root of 212101011 is about 596.3678822341.

Adding to 212101011 its reverse (110101212), we get a palindrome (322202223).

The spelling of 212101011 in words is "two hundred twelve million, one hundred one thousand, eleven".