202400020221 has 16 divisors (see below), whose sum is σ = 308824384128. Its totient is φ = 115505164800.

The previous prime is 202400020213. The next prime is 202400020283. The reversal of 202400020221 is 122020004202.

It is not a de Polignac number, because 202400020221 - 2³ = 202400020213 is a prime.

It is a super-2 number, since 2×202400020221² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 202400020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202400020021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6316540 + ... + 6348501.

It is an arithmetic number, because the mean of its divisors is an integer number (19301524008).

Almost surely, 2^202400020221 is an apocalyptic number.

202400020221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

202400020221 is a deficient number, since it is larger than the sum of its proper divisors (106424363907).

202400020221 is a wasteful number, since it uses less digits than its factorization.

202400020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12665812.

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 202400020221 its reverse (122020004202), we get a palindrome (324420024423).

The spelling of 202400020221 in words is "two hundred two billion, four hundred million, twenty thousand, two hundred twenty-one".