210920113 has 12 divisors (see below), whose sum is σ = 217456384. Its totient is φ = 204573600.

The previous prime is 210920111. The next prime is 210920119. The reversal of 210920113 is 311029012.

It is not a de Polignac number, because 210920113 - 2¹ = 210920111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210920111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 455320 + ... + 455782.

Almost surely, 2^210920113 is an apocalyptic number.

It is an amenable number.

210920113 is a deficient number, since it is larger than the sum of its proper divisors (6536271).

210920113 is an equidigital number, since it uses as much as digits as its factorization.

210920113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 210920113 is about 14523.0889620631. The cubic root of 210920113 is about 595.2590383989.

Adding to 210920113 its reverse (311029012), we get a palindrome (521949125).

It can be divided in two parts, 2109 and 20113, that added together give a palindrome (22222).

The spelling of 210920113 in words is "two hundred ten million, nine hundred twenty thousand, one hundred thirteen".