20021013021200 has 30 divisors (see below), whose sum is σ = 48100483784394. Its totient is φ = 8008405208320.

The previous prime is 20021013021199. The next prime is 20021013021311. The reversal of 20021013021200 is 212031012002.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 23338061824 + 19997674959376 = 152768^2 + 4471876^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25026265877 + ... + 25026266676.

Almost surely, 2^{20021013021200} is an apocalyptic number.

20021013021200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021013021200 is an abundant number, since it is smaller than the sum of its proper divisors (28079470763194).

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

20021013021200 is a wasteful number, since it uses less digits than its factorization.

20021013021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50052532571 (or 50052532560 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20021013021200 its reverse (212031012002), we get a palindrome (20233044033202).

The spelling of 20021013021200 in words is "twenty trillion, twenty-one billion, thirteen million, twenty-one thousand, two hundred".