210021113 has 2 divisors, whose sum is σ = 210021114. Its totient is φ = 210021112.

The previous prime is 210021101. The next prime is 210021121. The reversal of 210021113 is 311120012.

210021113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208600249 + 1420864 = 14443^2 + 1192^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210021113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210021094 and 210021103.

It is not a weakly prime, because it can be changed into another prime (210021143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010556 + 105010557.

It is an arithmetic number, because the mean of its divisors is an integer number (105010557).

Almost surely, 2^210021113 is an apocalyptic number.

It is an amenable number.

210021113 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021113 is an equidigital number, since it uses as much as digits as its factorization.

210021113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 210021113 is about 14492.1051955884. The cubic root of 210021113 is about 594.4121142952.

Adding to 210021113 its reverse (311120012), we get a palindrome (521141125).

The spelling of 210021113 in words is "two hundred ten million, twenty-one thousand, one hundred thirteen".