21011210002220 has 96 divisors (see below), whose sum is σ = 44381462146560. Its totient is φ = 8355527308800.

The previous prime is 21011210002201. The next prime is 21011210002241. The reversal of 21011210002220 is 2220001211012.

It is a junction number, because it is equal to n+sod(n) for n = 21011210002195 and 21011210002204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5001476120 + ... + 5001480320.

It is an arithmetic number, because the mean of its divisors is an integer number (462306897360).

Almost surely, 2^{21011210002220} is an apocalyptic number.

21011210002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21011210002220 is an abundant number, since it is smaller than the sum of its proper divisors (23370252144340).

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

21011210002220 is a wasteful number, since it uses less digits than its factorization.

21011210002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6423 (or 6421 counting only the distinct ones).

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

Adding to 21011210002220 its reverse (2220001211012), we get a palindrome (23231211213232).

The spelling of 21011210002220 in words is "twenty-one trillion, eleven billion, two hundred ten million, two thousand, two hundred twenty".