211021113 has 16 divisors (see below), whose sum is σ = 294183936. Its totient is φ = 134294160.

The previous prime is 211021099. The next prime is 211021133. The reversal of 211021113 is 311120112.

It is not a de Polignac number, because 211021113 - 2⁸ = 211020857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211021133) 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, 34948 + ... + 40538.

It is an arithmetic number, because the mean of its divisors is an integer number (18386496).

Almost surely, 2^211021113 is an apocalyptic number.

211021113 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

211021113 is a deficient number, since it is larger than the sum of its proper divisors (83162823).

211021113 is a wasteful number, since it uses less digits than its factorization.

211021113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6164.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 211021113 is about 14526.5657675860. The cubic root of 211021113 is about 595.3540373508.

Adding to 211021113 its reverse (311120112), we get a palindrome (522141225).

The spelling of 211021113 in words is "two hundred eleven million, twenty-one thousand, one hundred thirteen".