21012303030120 has 192 divisors, whose sum is σ = 71506812424320. Its totient is φ = 5548879759104.

The previous prime is 21012303030119. The next prime is 21012303030127. The reversal of 21012303030120 is 2103030321012.

21012303030120 is a `hidden beast` number, since 2 + 10 + 1 + 230 + 303 + 0 + 120 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21012303030093 and 21012303030102.

It is not an unprimeable number, because it can be changed into a prime (21012303030127) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9492819 + ... + 11495138.

It is an arithmetic number, because the mean of its divisors is an integer number (372431314710).

Almost surely, 2^{21012303030120} is an apocalyptic number.

21012303030120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21012303030120 is an abundant number, since it is smaller than the sum of its proper divisors (50494509394200).

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

21012303030120 is a wasteful number, since it uses less digits than its factorization.

21012303030120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20988086 (or 20988070 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21012303030120 its reverse (2103030321012), we get a palindrome (23115333351132).

The spelling of 21012303030120 in words is "twenty-one trillion, twelve billion, three hundred three million, thirty thousand, one hundred twenty".