20021100102102 has 32 divisors (see below), whose sum is σ = 43713097827840. Its totient is φ = 6062736474720.

The previous prime is 20021100102079. The next prime is 20021100102161. The reversal of 20021100102102 is 20120100112002.

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, 106494277 + ... + 106682112.

It is an arithmetic number, because the mean of its divisors is an integer number (1366034307120).

Almost surely, 2^{20021100102102} is an apocalyptic number.

20021100102102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20021100102102 is an abundant number, since it is smaller than the sum of its proper divisors (23691997725738).

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

20021100102102 is a wasteful number, since it uses less digits than its factorization.

20021100102102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213177828.

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

Adding to 20021100102102 its reverse (20120100112002), we get a palindrome (40141200214104).

The spelling of 20021100102102 in words is "twenty trillion, twenty-one billion, one hundred million, one hundred two thousand, one hundred two".