2100001121012 has 24 divisors (see below), whose sum is σ = 3725432650632. Its totient is φ = 1035592473600.

The previous prime is 2100001120963. The next prime is 2100001121027. The reversal of 2100001121012 is 2101211000012.

It can be written as a sum of positive squares in 4 ways, for example, as 24713097616 + 2075288023396 = 157204^2 + 1440586^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2100001120984 and 2100001121002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22636562 + ... + 22729142.

It is an arithmetic number, because the mean of its divisors is an integer number (155226360443).

Almost surely, 2^{2100001121012} is an apocalyptic number.

It is an amenable number.

2100001121012 is a deficient number, since it is larger than the sum of its proper divisors (1625431529620).

2100001121012 is a wasteful number, since it uses less digits than its factorization.

2100001121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170339 (or 170337 counting only the distinct ones).

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

Adding to 2100001121012 its reverse (2101211000012), we get a palindrome (4201212121024).

The spelling of 2100001121012 in words is "two trillion, one hundred billion, one million, one hundred twenty-one thousand, twelve".