21120401133 has 24 divisors (see below), whose sum is σ = 34070775648. Its totient is φ = 12997167984.

The previous prime is 21120401077. The next prime is 21120401143. The reversal of 21120401133 is 33110402112.

21120401133 is a `hidden beast` number, since 211 + 20 + 401 + 1 + 33 = 666.

It is not a de Polignac number, because 21120401133 - 2⁶ = 21120401069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120401143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3339735 + ... + 3346052.

It is an arithmetic number, because the mean of its divisors is an integer number (1419615652).

Almost surely, 2^21120401133 is an apocalyptic number.

It is an amenable number.

21120401133 is a deficient number, since it is larger than the sum of its proper divisors (12950374515).

21120401133 is an equidigital number, since it uses as much as digits as its factorization.

21120401133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6685815 (or 6685803 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21120401133 its reverse (33110402112), we get a palindrome (54230803245).

The spelling of 21120401133 in words is "twenty-one billion, one hundred twenty million, four hundred one thousand, one hundred thirty-three".