921240133133 has 4 divisors (see below), whose sum is σ = 921250547040. Its totient is φ = 921229719228.

The previous prime is 921240133129. The next prime is 921240133171. The reversal of 921240133133 is 331331042129.

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 921240133133 - 2² = 921240133129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 921240133133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921240133633) 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, 5073113 + ... + 5251566.

It is an arithmetic number, because the mean of its divisors is an integer number (230312636760).

Almost surely, 2^921240133133 is an apocalyptic number.

It is an amenable number.

921240133133 is a deficient number, since it is larger than the sum of its proper divisors (10413907).

921240133133 is a wasteful number, since it uses less digits than its factorization.

921240133133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10413906.

The product of its (nonzero) digits is 11664, while the sum is 32.

The spelling of 921240133133 in words is "nine hundred twenty-one billion, two hundred forty million, one hundred thirty-three thousand, one hundred thirty-three".