21301030302121 has 4 divisors (see below), whose sum is σ = 21302305906000. Its totient is φ = 21299754698244.

The previous prime is 21301030302103. The next prime is 21301030302161. The reversal of 21301030302121 is 12120303010312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21301030302121 - 2²¹ = 21301028204969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21301030302161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637776891 + ... + 637810288.

It is an arithmetic number, because the mean of its divisors is an integer number (5325576476500).

Almost surely, 2^{21301030302121} is an apocalyptic number.

It is an amenable number.

21301030302121 is a deficient number, since it is larger than the sum of its proper divisors (1275603879).

21301030302121 is a wasteful number, since it uses less digits than its factorization.

21301030302121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275603878.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21301030302121 its reverse (12120303010312), we get a palindrome (33421333312433).

The spelling of 21301030302121 in words is "twenty-one trillion, three hundred one billion, thirty million, three hundred two thousand, one hundred twenty-one".