203121431542 has 8 divisors (see below), whose sum is σ = 311164746336. Its totient is φ = 99399849432.

The previous prime is 203121431509. The next prime is 203121431563. The reversal of 203121431542 is 245134121302.

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

It is a self number, because there is not a number n which added to its sum of digits gives 203121431542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1080433053 + ... + 1080433240.

It is an arithmetic number, because the mean of its divisors is an integer number (38895593292).

Almost surely, 2^203121431542 is an apocalyptic number.

203121431542 is a deficient number, since it is larger than the sum of its proper divisors (108043314794).

203121431542 is a wasteful number, since it uses less digits than its factorization.

203121431542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2160866342.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 203121431542 its reverse (245134121302), we get a palindrome (448255552844).

The spelling of 203121431542 in words is "two hundred three billion, one hundred twenty-one million, four hundred thirty-one thousand, five hundred forty-two".