203112122001 has 16 divisors (see below), whose sum is σ = 278892441600. Its totient is φ = 131428045008.

The previous prime is 203112121999. The next prime is 203112122029. The reversal of 203112122001 is 100221211302.

It is not a de Polignac number, because 203112122001 - 2¹ = 203112121999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203112122501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7248841 + ... + 7276806.

It is an arithmetic number, because the mean of its divisors is an integer number (17430777600).

Almost surely, 2^203112122001 is an apocalyptic number.

It is an amenable number.

203112122001 is a deficient number, since it is larger than the sum of its proper divisors (75780319599).

203112122001 is a wasteful number, since it uses less digits than its factorization.

203112122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14525788.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 203112122001 its reverse (100221211302), we get a palindrome (303333333303).

The spelling of 203112122001 in words is "two hundred three billion, one hundred twelve million, one hundred twenty-two thousand, one".