12101220211 has 16 divisors (see below), whose sum is σ = 12878866080. Its totient is φ = 11331048960.

The previous prime is 12101220149. The next prime is 12101220223. The reversal of 12101220211 is 11202210121.

It is a cyclic number.

It is not a de Polignac number, because 12101220211 - 2⁹ = 12101219699 is a prime.

It is a super-2 number, since 2×12101220211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12101220191 and 12101220200.

It is not an unprimeable number, because it can be changed into a prime (12101221211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2839200 + ... + 2843458.

It is an arithmetic number, because the mean of its divisors is an integer number (804929130).

Almost surely, 2^12101220211 is an apocalyptic number.

12101220211 is a deficient number, since it is larger than the sum of its proper divisors (777645869).

12101220211 is a wasteful number, since it uses less digits than its factorization.

12101220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5094.

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

Adding to 12101220211 its reverse (11202210121), we get a palindrome (23303430332).

The spelling of 12101220211 in words is "twelve billion, one hundred one million, two hundred twenty thousand, two hundred eleven".