2101012121000 has 256 divisors, whose sum is σ = 5424634575360. Its totient is φ = 756745113600.

The previous prime is 2101012120997. The next prime is 2101012121003. The reversal of 2101012121000 is 1212101012.

It is an interprime number because it is at equal distance from previous prime (2101012120997) and next prime (2101012121003).

It is not an unprimeable number, because it can be changed into a prime (2101012121003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 546141077 + ... + 546144923.

It is an arithmetic number, because the mean of its divisors is an integer number (21189978810).

Almost surely, 2^{2101012121000} is an apocalyptic number.

2101012121000 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 2101012121000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2712317287680).

2101012121000 is an abundant number, since it is smaller than the sum of its proper divisors (3323622454360).

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

2101012121000 is a wasteful number, since it uses less digits than its factorization.

2101012121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4901 (or 4887 counting only the distinct ones).

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

Adding to 2101012121000 its reverse (1212101012), we get a palindrome (2102224222012).

The spelling of 2101012121000 in words is "two trillion, one hundred one billion, twelve million, one hundred twenty-one thousand".