21121300319 has 8 divisors (see below), whose sum is σ = 24547758720. Its totient is φ = 17797124376.

The previous prime is 21121300307. The next prime is 21121300331. The reversal of 21121300319 is 91300312112.

It is an interprime number because it is at equal distance from previous prime (21121300307) and next prime (21121300331).

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 21121300319 - 2⁴ = 21121300303 is a prime.

It is a super-2 number, since 2×21121300319² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21121300294 and 21121300303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121300919) 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, 25570169 + ... + 25570994.

It is an arithmetic number, because the mean of its divisors is an integer number (3068469840).

Almost surely, 2^21121300319 is an apocalyptic number.

21121300319 is a deficient number, since it is larger than the sum of its proper divisors (3426458401).

21121300319 is an equidigital number, since it uses as much as digits as its factorization.

21121300319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51141229.

The product of its (nonzero) digits is 324, while the sum is 23.

The spelling of 21121300319 in words is "twenty-one billion, one hundred twenty-one million, three hundred thousand, three hundred nineteen".