203421004203142 has 16 divisors (see below), whose sum is σ = 334324318150800. Its totient is φ = 92060319486240.

The previous prime is 203421004203091. The next prime is 203421004203191. The reversal of 203421004203142 is 241302400124302.

It is a self number, because there is not a number n which added to its sum of digits gives 203421004203142.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20188661517 + ... + 20188671592.

It is an arithmetic number, because the mean of its divisors is an integer number (20895269884425).

Almost surely, 2^{203421004203142} is an apocalyptic number.

203421004203142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

203421004203142 is a deficient number, since it is larger than the sum of its proper divisors (130903313947658).

203421004203142 is a wasteful number, since it uses less digits than its factorization.

203421004203142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40377333351.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 203421004203142 its reverse (241302400124302), we get a palindrome (444723404327444).

The spelling of 203421004203142 in words is "two hundred three trillion, four hundred twenty-one billion, four million, two hundred three thousand, one hundred forty-two".