21230132133021 has 16 divisors (see below), whose sum is σ = 32473683922944. Its totient is φ = 12085376680944.

The previous prime is 21230132132947. The next prime is 21230132133079. The reversal of 21230132133021 is 12033123103212.

It is not a de Polignac number, because 21230132133021 - 2⁹ = 21230132132509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21230132132982 and 21230132133000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230132137021) 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, 1921969141 + ... + 1921980186.

It is an arithmetic number, because the mean of its divisors is an integer number (2029605245184).

Almost surely, 2^{21230132133021} is an apocalyptic number.

21230132133021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21230132133021 is a deficient number, since it is larger than the sum of its proper divisors (11243551789923).

21230132133021 is a wasteful number, since it uses less digits than its factorization.

21230132133021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3843949600.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21230132133021 its reverse (12033123103212), we get a palindrome (33263255236233).

The spelling of 21230132133021 in words is "twenty-one trillion, two hundred thirty billion, one hundred thirty-two million, one hundred thirty-three thousand, twenty-one".