202121334 has 12 divisors (see below), whose sum is σ = 437929596. Its totient is φ = 67373772.

The previous prime is 202121323. The next prime is 202121377. The reversal of 202121334 is 433121202.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 11228963 = 202121334 / (2 + 0 + 2 + 1 + 2 + 1 + 3 + 3 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5614464 + ... + 5614499.

It is an arithmetic number, because the mean of its divisors is an integer number (36494133).

Almost surely, 2^202121334 is an apocalyptic number.

202121334 is an abundant number, since it is smaller than the sum of its proper divisors (235808262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

202121334 is a wasteful number, since it uses less digits than its factorization.

202121334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11228971 (or 11228968 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 202121334 is about 14216.9382779838. The cubic root of 202121334 is about 586.8638863591.

Adding to 202121334 its reverse (433121202), we get a palindrome (635242536).

The spelling of 202121334 in words is "two hundred two million, one hundred twenty-one thousand, three hundred thirty-four".