211021023203111 has 16 divisors (see below), whose sum is σ = 242321289354240. Its totient is φ = 181740221277120.

The previous prime is 211021023203041. The next prime is 211021023203183. The reversal of 211021023203111 is 111302320120112.

It is a de Polignac number, because none of the positive numbers 2^k-211021023203111 is a prime.

It is a super-2 number, since 2×211021023203111² (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 (211021023202111) 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, 163326011 + ... + 164612963.

It is an arithmetic number, because the mean of its divisors is an integer number (15145080584640).

Almost surely, 2^{211021023203111} is an apocalyptic number.

211021023203111 is a deficient number, since it is larger than the sum of its proper divisors (31300266151129).

211021023203111 is a wasteful number, since it uses less digits than its factorization.

211021023203111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2071526.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 211021023203111 its reverse (111302320120112), we get a palindrome (322323343323223).

The spelling of 211021023203111 in words is "two hundred eleven trillion, twenty-one billion, twenty-three million, two hundred three thousand, one hundred eleven".