21115053035 has 12 divisors (see below), whose sum is σ = 25941035952. Its totient is φ = 16499197008.

The previous prime is 21115052999. The next prime is 21115053067. The reversal of 21115053035 is 53035051112.

It is a happy number.

It is not a de Polignac number, because 21115053035 - 2¹² = 21115048939 is a prime.

It is a super-2 number, since 2×21115053035² (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 = 21115052995 and 21115053013.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1132727 + ... + 1151216.

It is an arithmetic number, because the mean of its divisors is an integer number (2161752996).

Almost surely, 2^21115053035 is an apocalyptic number.

21115053035 is a deficient number, since it is larger than the sum of its proper divisors (4825982917).

21115053035 is an equidigital number, since it uses as much as digits as its factorization.

21115053035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2284034 (or 2283991 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 26.

The spelling of 21115053035 in words is "twenty-one billion, one hundred fifteen million, fifty-three thousand, thirty-five".