2121020213 has 16 divisors (see below), whose sum is σ = 2299852800. Its totient is φ = 1944475200.

The previous prime is 2121020201. The next prime is 2121020219. The reversal of 2121020213 is 3120201212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2121020213 - 2¹⁸ = 2120758069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121020219) 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, 1842188 + ... + 1843338.

It is an arithmetic number, because the mean of its divisors is an integer number (143740800).

Almost surely, 2^2121020213 is an apocalyptic number.

It is an amenable number.

2121020213 is a deficient number, since it is larger than the sum of its proper divisors (178832587).

2121020213 is a wasteful number, since it uses less digits than its factorization.

2121020213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2121020213 is about 46054.5352055582. The cubic root of 2121020213 is about 1284.8376935206.

Adding to 2121020213 its reverse (3120201212), we get a palindrome (5241221425).

The spelling of 2121020213 in words is "two billion, one hundred twenty-one million, twenty thousand, two hundred thirteen".