21020002222000 has 80 divisors (see below), whose sum is σ = 50828590324512. Its totient is φ = 8407632825600.

The previous prime is 21020002221989. The next prime is 21020002222003. The reversal of 21020002222000 is 22220002012.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (21020002222003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47996014 + ... + 48431986.

Almost surely, 2^{21020002222000} is an apocalyptic number.

21020002222000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21020002222000 is an abundant number, since it is smaller than the sum of its proper divisors (29808588102512).

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

21020002222000 is a wasteful number, since it uses less digits than its factorization.

21020002222000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460103 (or 460087 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 21020002222000 its reverse (22220002012), we get a palindrome (21042222224012).

The spelling of 21020002222000 in words is "twenty-one trillion, twenty billion, two million, two hundred twenty-two thousand".