21213000132121 has 8 divisors (see below), whose sum is σ = 24759246355200. Its totient is φ = 17795708317248.

The previous prime is 21213000132019. The next prime is 21213000132193. The reversal of 21213000132121 is 12123100031212.

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

It is a cyclic number.

It is not a de Polignac number, because 21213000132121 - 2¹⁷ = 21213000001049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21213000112121) 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, 32238601696 + ... + 32238602353.

It is an arithmetic number, because the mean of its divisors is an integer number (3094905794400).

Almost surely, 2^{21213000132121} is an apocalyptic number.

It is an amenable number.

21213000132121 is a deficient number, since it is larger than the sum of its proper divisors (3546246223079).

21213000132121 is an equidigital number, since it uses as much as digits as its factorization.

21213000132121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64477204103.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21213000132121 its reverse (12123100031212), we get a palindrome (33336100163333).

The spelling of 21213000132121 in words is "twenty-one trillion, two hundred thirteen billion, one hundred thirty-two thousand, one hundred twenty-one".