20002121120000 has 360 divisors, whose sum is σ = 55123445051136. Its totient is φ = 7202787328000.

The previous prime is 20002121119993. The next prime is 20002121120039. The reversal of 20002121120000 is 2112120002.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 62400137 + ... + 62719863.

Almost surely, 2^{20002121120000} is an apocalyptic number.

20002121120000 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 20002121120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27561722525568).

20002121120000 is an abundant number, since it is smaller than the sum of its proper divisors (35121323931136).

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

20002121120000 is an equidigital number, since it uses as much as digits as its factorization.

20002121120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319803 (or 319774 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20002121120000 its reverse (2112120002), we get a palindrome (20004233240002).

The spelling of 20002121120000 in words is "twenty trillion, two billion, one hundred twenty-one million, one hundred twenty thousand".