21120213155519 has 2 divisors, whose sum is σ = 21120213155520. Its totient is φ = 21120213155518.

The previous prime is 21120213155507. The next prime is 21120213155549. The reversal of 21120213155519 is 91555131202112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21120213155519 is a prime.

It is a super-2 number, since 2×21120213155519² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21120213155549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560106577759 + 10560106577760.

It is an arithmetic number, because the mean of its divisors is an integer number (10560106577760).

Almost surely, 2^{21120213155519} is an apocalyptic number.

21120213155519 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120213155519 is an equidigital number, since it uses as much as digits as its factorization.

21120213155519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 38.

The spelling of 21120213155519 in words is "twenty-one trillion, one hundred twenty billion, two hundred thirteen million, one hundred fifty-five thousand, five hundred nineteen".