203106012221365 has 32 divisors (see below), whose sum is σ = 272564971531776. Its totient is φ = 144014502864960.

The previous prime is 203106012221293. The next prime is 203106012221393. The reversal of 203106012221365 is 563122210601302.

It is not a de Polignac number, because 203106012221365 - 2²³ = 203106003832757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203106012221365.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77207187 + ... + 79794496.

It is an arithmetic number, because the mean of its divisors is an integer number (8517655360368).

Almost surely, 2^{203106012221365} is an apocalyptic number.

It is an amenable number.

203106012221365 is a deficient number, since it is larger than the sum of its proper divisors (69458959310411).

203106012221365 is a wasteful number, since it uses less digits than its factorization.

203106012221365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157002289.

The product of its (nonzero) digits is 25920, while the sum is 34.

Adding to 203106012221365 its reverse (563122210601302), we get a palindrome (766228222822667).

The spelling of 203106012221365 in words is "two hundred three trillion, one hundred six billion, twelve million, two hundred twenty-one thousand, three hundred sixty-five".