20122121210000 has 100 divisors (see below), whose sum is σ = 48722561261484. Its totient is φ = 8048040000000.

The previous prime is 20122121209997. The next prime is 20122121210033. The reversal of 20122121210000 is 1212122102.

It can be written as a sum of positive squares in 10 ways, for example, as 20115906725776 + 6214484224 = 4485076^2 + 78832^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 104914190 + ... + 105105810.

Almost surely, 2^{20122121210000} is an apocalyptic number.

20122121210000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20122121210000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24361280630742).

20122121210000 is an abundant number, since it is smaller than the sum of its proper divisors (28600440051484).

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

20122121210000 is a wasteful number, since it uses less digits than its factorization.

20122121210000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202150 (or 202129 counting only the distinct ones).

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

Adding to 20122121210000 its reverse (1212122102), we get a palindrome (20123333332102).

The spelling of 20122121210000 in words is "twenty trillion, one hundred twenty-two billion, one hundred twenty-one million, two hundred ten thousand".