20011212021200 has 30 divisors (see below), whose sum is σ = 48076936881894. Its totient is φ = 8004484808320.

The previous prime is 20011212021193. The next prime is 20011212021209. The reversal of 20011212021200 is 212021211002.

It can be written as a sum of positive squares in 3 ways, for example, as 1826411696704 + 18184800324496 = 1351448^2 + 4264364^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011212021209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25014014627 + ... + 25014015426.

Almost surely, 2^{20011212021200} is an apocalyptic number.

20011212021200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011212021200 is an abundant number, since it is smaller than the sum of its proper divisors (28065724860694).

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

20011212021200 is a wasteful number, since it uses less digits than its factorization.

20011212021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50028030071 (or 50028030060 counting only the distinct ones).

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

Adding to 20011212021200 its reverse (212021211002), we get a palindrome (20223233232202).

The spelling of 20011212021200 in words is "twenty trillion, eleven billion, two hundred twelve million, twenty-one thousand, two hundred".