21120330313013 has 4 divisors (see below), whose sum is σ = 21198265111488. Its totient is φ = 21042395514540.

The previous prime is 21120330312911. The next prime is 21120330313021. The reversal of 21120330313013 is 31031303302112.

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 21120330313013 - 2¹⁰ = 21120330311989 is a prime.

It is a super-3 number, since 3×21120330313013³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21120330313013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120330313213) 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, 38967398831 + ... + 38967399372.

It is an arithmetic number, because the mean of its divisors is an integer number (5299566277872).

Almost surely, 2^{21120330313013} is an apocalyptic number.

It is an amenable number.

21120330313013 is a deficient number, since it is larger than the sum of its proper divisors (77934798475).

21120330313013 is an equidigital number, since it uses as much as digits as its factorization.

21120330313013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77934798474.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 21120330313013 its reverse (31031303302112), we get a palindrome (52151633615125).

The spelling of 21120330313013 in words is "twenty-one trillion, one hundred twenty billion, three hundred thirty million, three hundred thirteen thousand, thirteen".