20212221101000 has 64 divisors (see below), whose sum is σ = 47764880757360. Its totient is φ = 8004840000000.

The previous prime is 20212221100993. The next prime is 20212221101047. The reversal of 20212221101000 is 10112221202.

It can be written as a sum of positive squares in 8 ways, for example, as 2601827068324 + 17610394032676 = 1613018^2 + 4196474^2 .

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, 99959501 + ... + 100161500.

Almost surely, 2^{20212221101000} is an apocalyptic number.

20212221101000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212221101000 is an abundant number, since it is smaller than the sum of its proper divisors (27552659656360).

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

20212221101000 is a wasteful number, since it uses less digits than its factorization.

20212221101000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200121123 (or 200121109 counting only the distinct ones).

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

Adding to 20212221101000 its reverse (10112221202), we get a palindrome (20222333322202).

The spelling of 20212221101000 in words is "twenty trillion, two hundred twelve billion, two hundred twenty-one million, one hundred one thousand".