21200102022 has 64 divisors (see below), whose sum is σ = 46484928000. Its totient is φ = 6392398080.

The previous prime is 21200102009. The next prime is 21200102051. The reversal of 21200102022 is 22020100212.

It is a junction number, because it is equal to n+sod(n) for n = 21200101989 and 21200102007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19324978 + ... + 19326074.

It is an arithmetic number, because the mean of its divisors is an integer number (726327000).

Almost surely, 2^21200102022 is an apocalyptic number.

21200102022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21200102022 is an abundant number, since it is smaller than the sum of its proper divisors (25284825978).

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

21200102022 is a wasteful number, since it uses less digits than its factorization.

21200102022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2301.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21200102022 its reverse (22020100212), we get a palindrome (43220202234).

The spelling of 21200102022 in words is "twenty-one billion, two hundred million, one hundred two thousand, twenty-two".