21155141315020 has 12 divisors (see below), whose sum is σ = 44425796761584. Its totient is φ = 8462056526000.

The previous prime is 21155141314987. The next prime is 21155141315027. The reversal of 21155141315020 is 2051314155112.

21155141315020 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×21155141315020² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21155141315027) 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, 528878532856 + ... + 528878532895.

It is an arithmetic number, because the mean of its divisors is an integer number (3702149730132).

Almost surely, 2^{21155141315020} is an apocalyptic number.

21155141315020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21155141315020 is an abundant number, since it is smaller than the sum of its proper divisors (23270655446564).

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

21155141315020 is a wasteful number, since it uses less digits than its factorization.

21155141315020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057757065760 (or 1057757065758 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 31.

The spelling of 21155141315020 in words is "twenty-one trillion, one hundred fifty-five billion, one hundred forty-one million, three hundred fifteen thousand, twenty".