21101002102220 has 12 divisors (see below), whose sum is σ = 44312104414704. Its totient is φ = 8440400840880.

The previous prime is 21101002102217. The next prime is 21101002102223. The reversal of 21101002102220 is 2220120010112.

It is an interprime number because it is at equal distance from previous prime (21101002102217) and next prime (21101002102223).

It is a junction number, because it is equal to n+sod(n) for n = 21101002102195 and 21101002102204.

It is not an unprimeable number, because it can be changed into a prime (21101002102223) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 527525052536 + ... + 527525052575.

It is an arithmetic number, because the mean of its divisors is an integer number (3692675367892).

Almost surely, 2^{21101002102220} is an apocalyptic number.

21101002102220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21101002102220 is an abundant number, since it is smaller than the sum of its proper divisors (23211102312484).

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

21101002102220 is a wasteful number, since it uses less digits than its factorization.

21101002102220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055050105120 (or 1055050105118 counting only the distinct ones).

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

Adding to 21101002102220 its reverse (2220120010112), we get a palindrome (23321122112332).

The spelling of 21101002102220 in words is "twenty-one trillion, one hundred one billion, two million, one hundred two thousand, two hundred twenty".