20010121211000 has 64 divisors (see below), whose sum is σ = 48334125116160. Its totient is φ = 7745853360000.

The previous prime is 20010121210987. The next prime is 20010121211021. The reversal of 20010121211000 is 11212101002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322712891 + ... + 322774890.

It is an arithmetic number, because the mean of its divisors is an integer number (755220704940).

Almost surely, 2^{20010121211000} is an apocalyptic number.

20010121211000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20010121211000 is an abundant number, since it is smaller than the sum of its proper divisors (28324003905160).

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

20010121211000 is a wasteful number, since it uses less digits than its factorization.

20010121211000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645487833 (or 645487819 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20010121211000 its reverse (11212101002), we get a palindrome (20021333312002).

The spelling of 20010121211000 in words is "twenty trillion, ten billion, one hundred twenty-one million, two hundred eleven thousand".