212101220011 has 4 divisors (see below), whose sum is σ = 213978222072. Its totient is φ = 210224217952.

The previous prime is 212101220003. The next prime is 212101220039. The reversal of 212101220011 is 110022101212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212101220011 - 2³ = 212101220003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212101219973 and 212101220000.

It is not an unprimeable number, because it can be changed into a prime (212101220311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 938500861 + ... + 938501086.

It is an arithmetic number, because the mean of its divisors is an integer number (53494555518).

Almost surely, 2^212101220011 is an apocalyptic number.

212101220011 is a deficient number, since it is larger than the sum of its proper divisors (1877002061).

212101220011 is a wasteful number, since it uses less digits than its factorization.

212101220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1877002060.

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

Adding to 212101220011 its reverse (110022101212), we get a palindrome (322123321223).

The spelling of 212101220011 in words is "two hundred twelve billion, one hundred one million, two hundred twenty thousand, eleven".