21115525353330 has 32 divisors (see below), whose sum is σ = 52880620017024. Its totient is φ = 5385989075456.

The previous prime is 21115525353323. The next prime is 21115525353337. The reversal of 21115525353330 is 3335352551112.

It is an interprime number because it is at equal distance from previous prime (21115525353323) and next prime (21115525353337).

It is not an unprimeable number, because it can be changed into a prime (21115525353337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15301104639 + ... + 15301106018.

It is an arithmetic number, because the mean of its divisors is an integer number (1652519375532).

Almost surely, 2^{21115525353330} is an apocalyptic number.

21115525353330 is an abundant number, since it is smaller than the sum of its proper divisors (31765094663694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21115525353330 is a wasteful number, since it uses less digits than its factorization.

21115525353330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30602210690.

The product of its (nonzero) digits is 202500, while the sum is 39.

The spelling of 21115525353330 in words is "twenty-one trillion, one hundred fifteen billion, five hundred twenty-five million, three hundred fifty-three thousand, three hundred thirty".