202005505011421 has 8 divisors (see below), whose sum is σ = 205940247237720. Its totient is φ = 198075330103872.

The previous prime is 202005505011419. The next prime is 202005505011433. The reversal of 202005505011421 is 124110505500202.

It can be written as a sum of positive squares in 4 ways, for example, as 22048941096900 + 179956563914521 = 4695630^2 + 13414789^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202005505011421 - 2¹ = 202005505011419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202005505011421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202005505021421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1141740370 + ... + 1141917283.

It is an arithmetic number, because the mean of its divisors is an integer number (25742530904715).

Almost surely, 2^{202005505011421} is an apocalyptic number.

It is an amenable number.

202005505011421 is a deficient number, since it is larger than the sum of its proper divisors (3934742226299).

202005505011421 is a wasteful number, since it uses less digits than its factorization.

202005505011421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2283659375.

The product of its (nonzero) digits is 4000, while the sum is 28.

The spelling of 202005505011421 in words is "two hundred two trillion, five billion, five hundred five million, eleven thousand, four hundred twenty-one".