231121100020133 has 4 divisors (see below), whose sum is σ = 231122154253740. Its totient is φ = 231120045786528.

The previous prime is 231121100020093. The next prime is 231121100020193. The reversal of 231121100020133 is 331020001121132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 172675946546884 + 58445153473249 = 13140622^2 + 7644943^2 .

It is a cyclic number.

It is not a de Polignac number, because 231121100020133 - 2¹⁴ = 231121100003749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231121100020193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526787888 + ... + 527226441.

It is an arithmetic number, because the mean of its divisors is an integer number (57780538563435).

Almost surely, 2^{231121100020133} is an apocalyptic number.

It is an amenable number.

231121100020133 is a deficient number, since it is larger than the sum of its proper divisors (1054233607).

231121100020133 is a wasteful number, since it uses less digits than its factorization.

231121100020133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054233606.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 231121100020133 its reverse (331020001121132), we get a palindrome (562141101141265).

The spelling of 231121100020133 in words is "two hundred thirty-one trillion, one hundred twenty-one billion, one hundred million, twenty thousand, one hundred thirty-three".