21115653421302 has 64 divisors (see below), whose sum is σ = 51196653561600. Its totient is φ = 6397784015040.

The previous prime is 21115653421301. The next prime is 21115653421321. The reversal of 21115653421302 is 20312435651112.

21115653421302 is a `hidden beast` number, since 2 + 1 + 1 + 1 + 5 + 6 + 5 + 342 + 1 + 302 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21115653421301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1741413 + ... + 6727839.

It is an arithmetic number, because the mean of its divisors is an integer number (799947711900).

Almost surely, 2^{21115653421302} is an apocalyptic number.

21115653421302 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21115653421302 is an abundant number, since it is smaller than the sum of its proper divisors (30081000140298).

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

21115653421302 is a wasteful number, since it uses less digits than its factorization.

21115653421302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4993578 (or 4993572 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 21115653421302 in words is "twenty-one trillion, one hundred fifteen billion, six hundred fifty-three million, four hundred twenty-one thousand, three hundred two".