202121204 has 6 divisors (see below), whose sum is σ = 353712114. Its totient is φ = 101060600.

The previous prime is 202121203. The next prime is 202121219. The reversal of 202121204 is 402121202.

202121204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 172396900 + 29724304 = 13130^2 + 5452^2 .

It is a super-2 number, since 2×202121204² = 81705962212819232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202121203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25265147 + ... + 25265154.

It is an arithmetic number, because the mean of its divisors is an integer number (58952019).

Almost surely, 2^202121204 is an apocalyptic number.

It is an amenable number.

202121204 is a deficient number, since it is larger than the sum of its proper divisors (151590910).

202121204 is a wasteful number, since it uses less digits than its factorization.

202121204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50530305 (or 50530303 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 202121204 is about 14216.9337059719. The cubic root of 202121204 is about 586.8637605398.

Adding to 202121204 its reverse (402121202), we get a palindrome (604242406).

The spelling of 202121204 in words is "two hundred two million, one hundred twenty-one thousand, two hundred four".