2100120121210 has 16 divisors (see below), whose sum is σ = 3780232958376. Its totient is φ = 840044328448.

The previous prime is 2100120121171. The next prime is 2100120121213. The reversal of 2100120121210 is 121210210012.

It can be written as a sum of positive squares in 4 ways, for example, as 1791365419561 + 308754701649 = 1338419^2 + 555657^2 .

It is a super-2 number, since 2×2100120121210² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2100120121213) 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, 3589602 + ... + 4133458.

Almost surely, 2^{2100120121210} is an apocalyptic number.

2100120121210 is a deficient number, since it is larger than the sum of its proper divisors (1680112837166).

2100120121210 is a wasteful number, since it uses less digits than its factorization.

2100120121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930017.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2100120121210 its reverse (121210210012), we get a palindrome (2221330331222).

The spelling of 2100120121210 in words is "two trillion, one hundred billion, one hundred twenty million, one hundred twenty-one thousand, two hundred ten".