202121213 has 16 divisors (see below), whose sum is σ = 239700480. Its totient is φ = 166755456.

The previous prime is 202121203. The next prime is 202121219. The reversal of 202121213 is 312121202.

It is a happy number.

It is not a de Polignac number, because 202121213 - 2⁸ = 202120957 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 (202121219) 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, 73145 + ... + 75857.

It is an arithmetic number, because the mean of its divisors is an integer number (14981280).

Almost surely, 2^202121213 is an apocalyptic number.

It is an amenable number.

202121213 is a deficient number, since it is larger than the sum of its proper divisors (37579267).

202121213 is a wasteful number, since it uses less digits than its factorization.

202121213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3116.

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

The square root of 202121213 is about 14216.9340224958. The cubic root of 202121213 is about 586.8637692503.

Adding to 202121213 its reverse (312121202), we get a palindrome (514242415).

The spelling of 202121213 in words is "two hundred two million, one hundred twenty-one thousand, two hundred thirteen".