202121143404 has 72 divisors (see below), whose sum is σ = 513800921088. Its totient is φ = 61768729440.

The previous prime is 202121143363. The next prime is 202121143447. The reversal of 202121143404 is 404341121202.

It is a super-2 number, since 2×202121143404² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 618252 + ... + 886835.

It is an arithmetic number, because the mean of its divisors is an integer number (7136123904).

Almost surely, 2^202121143404 is an apocalyptic number.

It is an amenable number.

202121143404 is an abundant number, since it is smaller than the sum of its proper divisors (311679777684).

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

202121143404 is a wasteful number, since it uses less digits than its factorization.

202121143404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505163 (or 1505142 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 202121143404 its reverse (404341121202), we get a palindrome (606462264606).

The spelling of 202121143404 in words is "two hundred two billion, one hundred twenty-one million, one hundred forty-three thousand, four hundred four".