213010121 has 16 divisors (see below), whose sum is σ = 228191040. Its totient is φ = 198256320.

The previous prime is 213010117. The next prime is 213010123. The reversal of 213010121 is 121010312.

It is a cyclic number.

It is not a de Polignac number, because 213010121 - 2² = 213010117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213010123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 461831 + ... + 462291.

It is an arithmetic number, because the mean of its divisors is an integer number (14261940).

Almost surely, 2^213010121 is an apocalyptic number.

It is an amenable number.

213010121 is a deficient number, since it is larger than the sum of its proper divisors (15180919).

213010121 is a wasteful number, since it uses less digits than its factorization.

213010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856.

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

The square root of 213010121 is about 14594.8662549542. The cubic root of 213010121 is about 597.2187209172.

Adding to 213010121 its reverse (121010312), we get a palindrome (334020433).

The spelling of 213010121 in words is "two hundred thirteen million, ten thousand, one hundred twenty-one".