2101001001210 has 48 divisors (see below), whose sum is σ = 5462893471464. Its totient is φ = 560237101056.

The previous prime is 2101001001181. The next prime is 2101001001227. The reversal of 2101001001210 is 121001001012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 971097906249 + 1129903094961 = 985443^2 + 1062969^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2101001001192 and 2101001001201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1104594 + ... + 2328546.

Almost surely, 2^{2101001001210} is an apocalyptic number.

2101001001210 is an abundant number, since it is smaller than the sum of its proper divisors (3361892470254).

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

2101001001210 is a wasteful number, since it uses less digits than its factorization.

2101001001210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243039 (or 1243036 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 2101001001210 its reverse (121001001012), we get a palindrome (2222002002222).

The spelling of 2101001001210 in words is "two trillion, one hundred one billion, one million, one thousand, two hundred ten".