21021134301321 has 32 divisors (see below), whose sum is σ = 36463537317888. Its totient is φ = 10445284122240.

The previous prime is 21021134301301. The next prime is 21021134301359. The reversal of 21021134301321 is 12310343112012.

It is not a de Polignac number, because 21021134301321 - 2¹¹ = 21021134299273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21021134301291 and 21021134301300.

It is not an unprimeable number, because it can be changed into a prime (21021134301301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1978268196 + ... + 1978278821.

It is an arithmetic number, because the mean of its divisors is an integer number (1139485541184).

Almost surely, 2^{21021134301321} is an apocalyptic number.

21021134301321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21021134301321 is a deficient number, since it is larger than the sum of its proper divisors (15442403016567).

21021134301321 is a wasteful number, since it uses less digits than its factorization.

21021134301321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3956547061.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 21021134301321 its reverse (12310343112012), we get a palindrome (33331477413333).

The spelling of 21021134301321 in words is "twenty-one trillion, twenty-one billion, one hundred thirty-four million, three hundred one thousand, three hundred twenty-one".