21121013119 has 2 divisors, whose sum is σ = 21121013120. Its totient is φ = 21121013118.

The previous prime is 21121013099. The next prime is 21121013143. The reversal of 21121013119 is 91131012112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21121013119 - 2⁹ = 21121012607 is a prime.

It is a super-2 number, since 2×21121013119² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21121013119.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21151013119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560506559 + 10560506560.

It is an arithmetic number, because the mean of its divisors is an integer number (10560506560).

Almost surely, 2^21121013119 is an apocalyptic number.

21121013119 is a deficient number, since it is larger than the sum of its proper divisors (1).

21121013119 is an equidigital number, since it uses as much as digits as its factorization.

21121013119 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 22.

The spelling of 21121013119 in words is "twenty-one billion, one hundred twenty-one million, thirteen thousand, one hundred nineteen".