213020121 has 8 divisors (see below), whose sum is σ = 290070144. Its totient is φ = 138991760.

The previous prime is 213020069. The next prime is 213020161. The reversal of 213020121 is 121020312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213020121 - 2⁶ = 213020057 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 213020097 and 213020106.

It is not an unprimeable number, because it can be changed into a prime (213020161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 755250 + ... + 755531.

It is an arithmetic number, because the mean of its divisors is an integer number (36258768).

Almost surely, 2^213020121 is an apocalyptic number.

It is an amenable number.

213020121 is a deficient number, since it is larger than the sum of its proper divisors (77050023).

213020121 is a wasteful number, since it uses less digits than its factorization.

213020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510831.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 213020121 is about 14595.2088371493. The cubic root of 213020121 is about 597.2280664728.

Adding to 213020121 its reverse (121020312), we get a palindrome (334040433).

The spelling of 213020121 in words is "two hundred thirteen million, twenty thousand, one hundred twenty-one".