21001132231133 has 16 divisors (see below), whose sum is σ = 22704755754240. Its totient is φ = 19357378056000.

The previous prime is 21001132231129. The next prime is 21001132231141. The reversal of 21001132231133 is 33113223110012.

It is a cyclic number.

It is not a de Polignac number, because 21001132231133 - 2² = 21001132231129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21001132231099 and 21001132231108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001132231103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19230683 + ... + 20293383.

It is an arithmetic number, because the mean of its divisors is an integer number (1419047234640).

Almost surely, 2^{21001132231133} is an apocalyptic number.

It is an amenable number.

21001132231133 is a deficient number, since it is larger than the sum of its proper divisors (1703623523107).

21001132231133 is a wasteful number, since it uses less digits than its factorization.

21001132231133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090868.

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

Adding to 21001132231133 its reverse (33113223110012), we get a palindrome (54114355341145).

The spelling of 21001132231133 in words is "twenty-one trillion, one billion, one hundred thirty-two million, two hundred thirty-one thousand, one hundred thirty-three".