211221142111 has 32 divisors (see below), whose sum is σ = 252126887040. Its totient is φ = 173121048576.

The previous prime is 211221142103. The next prime is 211221142117. The reversal of 211221142111 is 111241122112.

It is not a de Polignac number, because 211221142111 - 2³ = 211221142103 is a prime.

It is a super-2 number, since 2×211221142111² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221142117) 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, 38007145 + ... + 38012701.

It is an arithmetic number, because the mean of its divisors is an integer number (7878965220).

Almost surely, 2^211221142111 is an apocalyptic number.

211221142111 is a deficient number, since it is larger than the sum of its proper divisors (40905744929).

211221142111 is a wasteful number, since it uses less digits than its factorization.

211221142111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7363.

The product of its digits is 64, while the sum is 19.

Adding to 211221142111 its reverse (111241122112), we get a palindrome (322462264223).

The spelling of 211221142111 in words is "two hundred eleven billion, two hundred twenty-one million, one hundred forty-two thousand, one hundred eleven".