21121012319 has 8 divisors (see below), whose sum is σ = 23576944512. Its totient is φ = 18754386840.

The previous prime is 21121012307. The next prime is 21121012357. The reversal of 21121012319 is 91321012112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21121012319 is a prime.

It is a super-2 number, since 2×21121012319² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121012294 and 21121012303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121012219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22326179 + ... + 22327124.

It is an arithmetic number, because the mean of its divisors is an integer number (2947118064).

Almost surely, 2^21121012319 is an apocalyptic number.

21121012319 is a deficient number, since it is larger than the sum of its proper divisors (2455932193).

21121012319 is a wasteful number, since it uses less digits than its factorization.

21121012319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44653357.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 21121012319 in words is "twenty-one billion, one hundred twenty-one million, twelve thousand, three hundred nineteen".