231121202023533 has 32 divisors (see below), whose sum is σ = 316843830358272. Its totient is φ = 149749082380800.

The previous prime is 231121202023493. The next prime is 231121202023631. The reversal of 231121202023533 is 335320202121132.

It is not a de Polignac number, because 231121202023533 - 2⁶ = 231121202023469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231121202023533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231121202022533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 366380353 + ... + 367010633.

It is an arithmetic number, because the mean of its divisors is an integer number (9901369698696).

Almost surely, 2^{231121202023533} is an apocalyptic number.

It is an amenable number.

231121202023533 is a deficient number, since it is larger than the sum of its proper divisors (85722628334739).

231121202023533 is a wasteful number, since it uses less digits than its factorization.

231121202023533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634005.

The product of its (nonzero) digits is 12960, while the sum is 30.

Adding to 231121202023533 its reverse (335320202121132), we get a palindrome (566441404144665).

The spelling of 231121202023533 in words is "two hundred thirty-one trillion, one hundred twenty-one billion, two hundred two million, twenty-three thousand, five hundred thirty-three".