21100030220120 has 64 divisors (see below), whose sum is σ = 47609688280320. Its totient is φ = 8416106665344.

The previous prime is 21100030220111. The next prime is 21100030220161. The reversal of 21100030220120 is 2102203000112.

It is a happy number.

It is a super-2 number, since 2×21100030220120² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21100030220095 and 21100030220104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24570719 + ... + 25414961.

It is an arithmetic number, because the mean of its divisors is an integer number (743901379380).

Almost surely, 2^{21100030220120} is an apocalyptic number.

21100030220120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21100030220120 is an abundant number, since it is smaller than the sum of its proper divisors (26509658060200).

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

21100030220120 is a wasteful number, since it uses less digits than its factorization.

21100030220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846024 (or 846020 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21100030220120 its reverse (2102203000112), we get a palindrome (23202233220232).

The spelling of 21100030220120 in words is "twenty-one trillion, one hundred billion, thirty million, two hundred twenty thousand, one hundred twenty".