203121031442 has 32 divisors (see below), whose sum is σ = 362844040320. Its totient is φ = 83436554880.

The previous prime is 203121031427. The next prime is 203121031453. The reversal of 203121031442 is 244130121302.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1770284 + ... + 1881527.

It is an arithmetic number, because the mean of its divisors is an integer number (11338876260).

Almost surely, 2^203121031442 is an apocalyptic number.

203121031442 is a deficient number, since it is larger than the sum of its proper divisors (159723008878).

203121031442 is a wasteful number, since it uses less digits than its factorization.

203121031442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3651986.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 203121031442 its reverse (244130121302), we get a palindrome (447251152744).

The spelling of 203121031442 in words is "two hundred three billion, one hundred twenty-one million, thirty-one thousand, four hundred forty-two".