21102200101220 has 48 divisors (see below), whose sum is σ = 50885305339008. Its totient is φ = 7200750735360.

The previous prime is 21102200101211. The next prime is 21102200101259. The reversal of 21102200101220 is 2210100220112.

It is a super-2 number, since 2×21102200101220² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 21102200101195 and 21102200101204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 357150557 + ... + 357209636.

It is an arithmetic number, because the mean of its divisors is an integer number (1060110527896).

Almost surely, 2^{21102200101220} is an apocalyptic number.

21102200101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21102200101220 is an abundant number, since it is smaller than the sum of its proper divisors (29783105237788).

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

21102200101220 is a wasteful number, since it uses less digits than its factorization.

21102200101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714360420 (or 714360418 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21102200101220 its reverse (2210100220112), we get a palindrome (23312300321332).

The spelling of 21102200101220 in words is "twenty-one trillion, one hundred two billion, two hundred million, one hundred one thousand, two hundred twenty".