203121031133042 has 16 divisors (see below), whose sum is σ = 338013426232800. Its totient is φ = 90762864450240.

The previous prime is 203121031133023. The next prime is 203121031133047. The reversal of 203121031133042 is 240331130121302.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (203121031133047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78243847367 + ... + 78243849962.

It is an arithmetic number, because the mean of its divisors is an integer number (21125839139550).

Almost surely, 2^{203121031133042} is an apocalyptic number.

203121031133042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

203121031133042 is a deficient number, since it is larger than the sum of its proper divisors (134892395099758).

203121031133042 is a wasteful number, since it uses less digits than its factorization.

203121031133042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156487697401.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 203121031133042 its reverse (240331130121302), we get a palindrome (443452161254344).

The spelling of 203121031133042 in words is "two hundred three trillion, one hundred twenty-one billion, thirty-one million, one hundred thirty-three thousand, forty-two".