133311232121 has 16 divisors (see below), whose sum is σ = 141701204736. Its totient is φ = 125159333376.

The previous prime is 133311232079. The next prime is 133311232123. The reversal of 133311232121 is 121232113331.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133311232121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133311232123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18701 + ... + 516693.

It is an arithmetic number, because the mean of its divisors is an integer number (8856325296).

Almost surely, 2^133311232121 is an apocalyptic number.

It is an amenable number.

133311232121 is a deficient number, since it is larger than the sum of its proper divisors (8389972615).

133311232121 is a wasteful number, since it uses less digits than its factorization.

133311232121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498232.

The product of its digits is 648, while the sum is 23.

Adding to 133311232121 its reverse (121232113331), we get a palindrome (254543345452).

The spelling of 133311232121 in words is "one hundred thirty-three billion, three hundred eleven million, two hundred thirty-two thousand, one hundred twenty-one".