203021231321121 has 4 divisors (see below), whose sum is σ = 270694975094832. Its totient is φ = 135347487547412.

The previous prime is 203021231321071. The next prime is 203021231321137. The reversal of 203021231321121 is 121123132120302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 203021231321121 - 2²⁵ = 203021197766689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203021231321091 and 203021231321100.

It is not an unprimeable number, because it can be changed into a prime (203021231321521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33836871886851 + ... + 33836871886856.

It is an arithmetic number, because the mean of its divisors is an integer number (67673743773708).

Almost surely, 2^{203021231321121} is an apocalyptic number.

It is an amenable number.

203021231321121 is a deficient number, since it is larger than the sum of its proper divisors (67673743773711).

203021231321121 is an equidigital number, since it uses as much as digits as its factorization.

203021231321121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67673743773710.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 203021231321121 its reverse (121123132120302), we get a palindrome (324144363441423).

The spelling of 203021231321121 in words is "two hundred three trillion, twenty-one billion, two hundred thirty-one million, three hundred twenty-one thousand, one hundred twenty-one".