21115201455344 has 20 divisors (see below), whose sum is σ = 40929846874224. Its totient is φ = 10552660326528.

The previous prime is 21115201455343. The next prime is 21115201455367. The reversal of 21115201455344 is 44355410251112.

It is a super-2 number, since 2×21115201455344² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21115201455298 and 21115201455307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21115201455343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308739812 + ... + 308808195.

Almost surely, 2^{21115201455344} is an apocalyptic number.

It is an amenable number.

21115201455344 is a deficient number, since it is larger than the sum of its proper divisors (19814645418880).

21115201455344 is a wasteful number, since it uses less digits than its factorization.

21115201455344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617550152 (or 617550146 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 38.

The spelling of 21115201455344 in words is "twenty-one trillion, one hundred fifteen billion, two hundred one million, four hundred fifty-five thousand, three hundred forty-four".