21115345400030 has 128 divisors (see below), whose sum is σ = 44319965184000. Its totient is φ = 7093270647936.

The previous prime is 21115345399991. The next prime is 21115345400053. The reversal of 21115345400030 is 3000454351112.

It is a super-2 number, since 2×21115345400030² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21115345399966 and 21115345400002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3636185387 + ... + 3636191193.

It is an arithmetic number, because the mean of its divisors is an integer number (346249728000).

Almost surely, 2^{21115345400030} is an apocalyptic number.

21115345400030 is an abundant number, since it is smaller than the sum of its proper divisors (23204619783970).

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

21115345400030 is a wasteful number, since it uses less digits than its factorization.

21115345400030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8646.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 21115345400030 its reverse (3000454351112), we get a palindrome (24115799751142).

The spelling of 21115345400030 in words is "twenty-one trillion, one hundred fifteen billion, three hundred forty-five million, four hundred thousand, thirty".