211021323011 has 16 divisors (see below), whose sum is σ = 215307552768. Its totient is φ = 206762608800.

The previous prime is 211021322959. The next prime is 211021323031. The reversal of 211021323011 is 110323120112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211021323011 is a prime.

It is a super-2 number, since 2×211021323011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211021323031) 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, 62228126 + ... + 62231516.

It is an arithmetic number, because the mean of its divisors is an integer number (13456722048).

Almost surely, 2^211021323011 is an apocalyptic number.

211021323011 is a deficient number, since it is larger than the sum of its proper divisors (4286229757).

211021323011 is a wasteful number, since it uses less digits than its factorization.

211021323011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7082.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 211021323011 its reverse (110323120112), we get a palindrome (321344443123).

The spelling of 211021323011 in words is "two hundred eleven billion, twenty-one million, three hundred twenty-three thousand, eleven".