2101200121010 has 16 divisors (see below), whose sum is σ = 3787494730200. Its totient is φ = 839294601216.

The previous prime is 2101200121001. The next prime is 2101200121019. The reversal of 2101200121010 is 101210021012.

It is an interprime number because it is at equal distance from previous prime (2101200121001) and next prime (2101200121019).

It can be written as a sum of positive squares in 4 ways, for example, as 1528736889241 + 572463231769 = 1236421^2 + 756613^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2101200120982 and 2101200121000.

It is not an unprimeable number, because it can be changed into a prime (2101200121019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148173455 + ... + 148187634.

Almost surely, 2^{2101200121010} is an apocalyptic number.

2101200121010 is a deficient number, since it is larger than the sum of its proper divisors (1686294609190).

2101200121010 is a wasteful number, since it uses less digits than its factorization.

2101200121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296361805.

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

Adding to 2101200121010 its reverse (101210021012), we get a palindrome (2202410142022).

The spelling of 2101200121010 in words is "two trillion, one hundred one billion, two hundred million, one hundred twenty-one thousand, ten".