21033311133121 has 8 divisors (see below), whose sum is σ = 24038989208064. Its totient is φ = 18027862893600.

The previous prime is 21033311133077. The next prime is 21033311133193. The reversal of 21033311133121 is 12133111333012.

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

It is not a de Polignac number, because 21033311133121 - 2¹¹ = 21033311131073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21033314133121) 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, 57262705 + ... + 57628846.

It is an arithmetic number, because the mean of its divisors is an integer number (3004873651008).

Almost surely, 2^{21033311133121} is an apocalyptic number.

It is an amenable number.

21033311133121 is a deficient number, since it is larger than the sum of its proper divisors (3005678074943).

21033311133121 is a wasteful number, since it uses less digits than its factorization.

21033311133121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114917711.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 21033311133121 its reverse (12133111333012), we get a palindrome (33166422466133).

The spelling of 21033311133121 in words is "twenty-one trillion, thirty-three billion, three hundred eleven million, one hundred thirty-three thousand, one hundred twenty-one".