202142201421 has 4 divisors (see below), whose sum is σ = 269522935232. Its totient is φ = 134761467612.

The previous prime is 202142201419. The next prime is 202142201497. The reversal of 202142201421 is 124102241202.

202142201421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 202142201421 - 2¹ = 202142201419 is a prime.

It is a super-2 number, since 2×202142201421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202142201411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33690366901 + ... + 33690366906.

It is an arithmetic number, because the mean of its divisors is an integer number (67380733808).

Almost surely, 2^202142201421 is an apocalyptic number.

It is an amenable number.

202142201421 is a deficient number, since it is larger than the sum of its proper divisors (67380733811).

202142201421 is an equidigital number, since it uses as much as digits as its factorization.

202142201421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67380733810.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 202142201421 its reverse (124102241202), we get a palindrome (326244442623).

The spelling of 202142201421 in words is "two hundred two billion, one hundred forty-two million, two hundred one thousand, four hundred twenty-one".