203121010131211 has 12 divisors (see below), whose sum is σ = 207544024325232. Its totient is φ = 198790340598608.

The previous prime is 203121010131199. The next prime is 203121010131223. The reversal of 203121010131211 is 112131010121302.

It is an interprime number because it is at equal distance from previous prime (203121010131199) and next prime (203121010131223).

It is not a de Polignac number, because 203121010131211 - 2⁹ = 203121010130699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203121010131241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47297961 + ... + 51413413.

It is an arithmetic number, because the mean of its divisors is an integer number (17295335360436).

Almost surely, 2^{203121010131211} is an apocalyptic number.

203121010131211 is a deficient number, since it is larger than the sum of its proper divisors (4423014194021).

203121010131211 is an equidigital number, since it uses as much as digits as its factorization.

203121010131211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4137890 (or 4137843 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 203121010131211 its reverse (112131010121302), we get a palindrome (315252020252513).

Subtracting from 203121010131211 its reverse (112131010121302), we obtain a palindrome (90990000009909).

The spelling of 203121010131211 in words is "two hundred three trillion, one hundred twenty-one billion, ten million, one hundred thirty-one thousand, two hundred eleven".