21000220101102 has 128 divisors (see below), whose sum is σ = 49118592015360. Its totient is φ = 5920620963840.

The previous prime is 21000220101101. The next prime is 21000220101109. The reversal of 21000220101102 is 20110102200012.

It is a super-2 number, since 2×21000220101102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000220101101) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 181302118 + ... + 181417910.

It is an arithmetic number, because the mean of its divisors is an integer number (383739000120).

Almost surely, 2^{21000220101102} is an apocalyptic number.

21000220101102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21000220101102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24559296007680).

21000220101102 is an abundant number, since it is smaller than the sum of its proper divisors (28118371914258).

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

21000220101102 is a wasteful number, since it uses less digits than its factorization.

21000220101102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119098.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21000220101102 its reverse (20110102200012), we get a palindrome (41110322301114).

The spelling of 21000220101102 in words is "twenty-one trillion, two hundred twenty million, one hundred one thousand, one hundred two".