1210120202105 has 4 divisors (see below), whose sum is σ = 1452144242532. Its totient is φ = 968096161680.

The previous prime is 1210120202029. The next prime is 1210120202119. The reversal of 1210120202105 is 5012020210121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 218130097936 + 991990104169 = 467044^2 + 995987^2 .

It is not a de Polignac number, because 1210120202105 - 2²⁶ = 1210053093241 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121012020206 + ... + 121012020215.

It is an arithmetic number, because the mean of its divisors is an integer number (363036060633).

Almost surely, 2^{1210120202105} is an apocalyptic number.

It is an amenable number.

1210120202105 is a deficient number, since it is larger than the sum of its proper divisors (242024040427).

1210120202105 is an equidigital number, since it uses as much as digits as its factorization.

1210120202105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242024040426.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 1210120202105 its reverse (5012020210121), we get a palindrome (6222140412226).

The spelling of 1210120202105 in words is "one trillion, two hundred ten billion, one hundred twenty million, two hundred two thousand, one hundred five".