203123220311321 has 16 divisors (see below), whose sum is σ = 214238427090240. Its totient is φ = 192050561926080.

The previous prime is 203123220311311. The next prime is 203123220311351. The reversal of 203123220311321 is 123113022321302.

It is a cyclic number.

It is not a de Polignac number, because 203123220311321 - 2¹⁴ = 203123220294937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203123220311311) 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, 74028506 + ... + 76723308.

It is an arithmetic number, because the mean of its divisors is an integer number (13389901693140).

Almost surely, 2^{203123220311321} is an apocalyptic number.

It is an amenable number.

203123220311321 is a deficient number, since it is larger than the sum of its proper divisors (11115206778919).

203123220311321 is a wasteful number, since it uses less digits than its factorization.

203123220311321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2702696.

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

Adding to 203123220311321 its reverse (123113022321302), we get a palindrome (326236242632623).

The spelling of 203123220311321 in words is "two hundred three trillion, one hundred twenty-three billion, two hundred twenty million, three hundred eleven thousand, three hundred twenty-one".