211020203111 has 4 divisors (see below), whose sum is σ = 211083028800. Its totient is φ = 210957377424.

The previous prime is 211020203089. The next prime is 211020203123. The reversal of 211020203111 is 111302020112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211020203111 - 2²² = 211016008807 is a prime.

It is a super-2 number, since 2×211020203111² (a number of 23 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 (211020203131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31407806 + ... + 31414523.

It is an arithmetic number, because the mean of its divisors is an integer number (52770757200).

Almost surely, 2^211020203111 is an apocalyptic number.

211020203111 is a deficient number, since it is larger than the sum of its proper divisors (62825689).

211020203111 is an equidigital number, since it uses as much as digits as its factorization.

211020203111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62825688.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 211020203111 its reverse (111302020112), we get a palindrome (322322223223).

The spelling of 211020203111 in words is "two hundred eleven billion, twenty million, two hundred three thousand, one hundred eleven".