202121030004 has 24 divisors (see below), whose sum is σ = 472666118400. Its totient is φ = 67223622144.

The previous prime is 202121030003. The next prime is 202121030021. The reversal of 202121030004 is 400030121202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202121030003) 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, 18751204 + ... + 18761979.

It is an arithmetic number, because the mean of its divisors is an integer number (19694421600).

Almost surely, 2^202121030004 is an apocalyptic number.

It is an amenable number.

202121030004 is an abundant number, since it is smaller than the sum of its proper divisors (270545088396).

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

202121030004 is a wasteful number, since it uses less digits than its factorization.

202121030004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37513639 (or 37513637 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 202121030004 its reverse (400030121202), we get a palindrome (602151151206).

The spelling of 202121030004 in words is "two hundred two billion, one hundred twenty-one million, thirty thousand, four".