211211220313111 has 32 divisors (see below), whose sum is σ = 226662937217280. Its totient is φ = 196106163585024.

The previous prime is 211211220313099. The next prime is 211211220313201. The reversal of 211211220313111 is 111313022112112.

It is a de Polignac number, because none of the positive numbers 2^k-211211220313111 is a prime.

It is a super-2 number, since 2×211211220313111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211211220319111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10670996031 + ... + 10671015823.

It is an arithmetic number, because the mean of its divisors is an integer number (7083216788040).

Almost surely, 2^{211211220313111} is an apocalyptic number.

211211220313111 is a deficient number, since it is larger than the sum of its proper divisors (15451716904169).

211211220313111 is a wasteful number, since it uses less digits than its factorization.

211211220313111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35595.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 211211220313111 its reverse (111313022112112), we get a palindrome (322524242425223).

The spelling of 211211220313111 in words is "two hundred eleven trillion, two hundred eleven billion, two hundred twenty million, three hundred thirteen thousand, one hundred eleven".