133391111721 has 8 divisors (see below), whose sum is σ = 203262646464. Its totient is φ = 76223492400.

The previous prime is 133391111701. The next prime is 133391111837. The reversal of 133391111721 is 127111193331.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133391111721 - 2⁶ = 133391111657 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (133391111701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3175978830 + ... + 3175978871.

It is an arithmetic number, because the mean of its divisors is an integer number (25407830808).

Almost surely, 2^133391111721 is an apocalyptic number.

It is an amenable number.

133391111721 is a deficient number, since it is larger than the sum of its proper divisors (69871534743).

133391111721 is an equidigital number, since it uses as much as digits as its factorization.

133391111721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6351957711.

The product of its digits is 3402, while the sum is 33.

The spelling of 133391111721 in words is "one hundred thirty-three billion, three hundred ninety-one million, one hundred eleven thousand, seven hundred twenty-one".