20012221210000 has 100 divisors (see below), whose sum is σ = 49272803593200. Its totient is φ = 7869212176000.

The previous prime is 20012221209979. The next prime is 20012221210039. The reversal of 20012221210000 is 1212221002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (100).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16369510 + ... + 17549509.

It is an arithmetic number, because the mean of its divisors is an integer number (492728035932).

Almost surely, 2^{20012221210000} is an apocalyptic number.

20012221210000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012221210000 is an abundant number, since it is smaller than the sum of its proper divisors (29260582383200).

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

20012221210000 is an equidigital number, since it uses as much as digits as its factorization.

20012221210000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33919106 (or 33919085 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20012221210000 its reverse (1212221002), we get a palindrome (20013433431002).

The spelling of 20012221210000 in words is "twenty trillion, twelve billion, two hundred twenty-one million, two hundred ten thousand".