2001020121010 has 8 divisors (see below), whose sum is σ = 3601836217836. Its totient is φ = 800408048400.

The previous prime is 2001020120951. The next prime is 2001020121013. The reversal of 2001020121010 is 101210201002.

It can be written as a sum of positive squares in 2 ways, for example, as 1926879910641 + 74140210369 = 1388121^2 + 272287^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (10), and also a Moran number because the ratio is a prime number: 200102012101 = 2001020121010 / (2 + 0 + 0 + 1 + 0 + 2 + 0 + 1 + 2 + 1 + 0 + 1 + 0).

It is not an unprimeable number, because it can be changed into a prime (2001020121013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100051006041 + ... + 100051006060.

Almost surely, 2^{2001020121010} is an apocalyptic number.

2001020121010 is a deficient number, since it is larger than the sum of its proper divisors (1600816096826).

2001020121010 is a wasteful number, since it uses less digits than its factorization.

2001020121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200102012108.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 2001020121010 its reverse (101210201002), we get a palindrome (2102230322012).

The spelling of 2001020121010 in words is "two trillion, one billion, twenty million, one hundred twenty-one thousand, ten".