211122121011 has 8 divisors (see below), whose sum is σ = 285697596864. Its totient is φ = 138647362920.

The previous prime is 211122121009. The next prime is 211122121051. The reversal of 211122121011 is 110121221112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211122121011 - 2¹ = 211122121009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211122121051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525179205 + ... + 525179606.

It is an arithmetic number, because the mean of its divisors is an integer number (35712199608).

Almost surely, 2^211122121011 is an apocalyptic number.

211122121011 is a deficient number, since it is larger than the sum of its proper divisors (74575475853).

211122121011 is a wasteful number, since it uses less digits than its factorization.

211122121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050358881.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211122121011 its reverse (110121221112), we get a palindrome (321243342123).

The spelling of 211122121011 in words is "two hundred eleven billion, one hundred twenty-two million, one hundred twenty-one thousand, eleven".