1210930390121 has 4 divisors (see below), whose sum is σ = 1252686610500. Its totient is φ = 1169174169744.

The previous prime is 1210930390093. The next prime is 1210930390127.

It is a happy number.

1210930390121 is nontrivially palindromic in base 10.

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 964255261225 + 246675128896 = 981965^2 + 496664^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210930390121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210930390127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20878110146 + ... + 20878110203.

It is an arithmetic number, because the mean of its divisors is an integer number (313171652625).

Almost surely, 2^{1210930390121} is an apocalyptic number.

It is an amenable number.

1210930390121 is a deficient number, since it is larger than the sum of its proper divisors (41756220379).

1210930390121 is an equidigital number, since it uses as much as digits as its factorization.

1210930390121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41756220378.

The product of its (nonzero) digits is 2916, while the sum is 32.

The spelling of 1210930390121 in words is "one trillion, two hundred ten billion, nine hundred thirty million, three hundred ninety thousand, one hundred twenty-one".