1210421303989 has 8 divisors (see below), whose sum is σ = 1273455770328. Its totient is φ = 1148982647040.

The previous prime is 1210421303963. The next prime is 1210421304013. The reversal of 1210421303989 is 9893031240121.

It can be written as a sum of positive squares in 4 ways, for example, as 513702225 + 1209907601764 = 22665^2 + 1099958^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210421303989 is a prime.

It is a super-2 number, since 2×1210421303989² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210421306989) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 398950792 + ... + 398953825.

It is an arithmetic number, because the mean of its divisors is an integer number (159181971291).

Almost surely, 2^{1210421303989} is an apocalyptic number.

It is an amenable number.

1210421303989 is a deficient number, since it is larger than the sum of its proper divisors (63034466339).

1210421303989 is an equidigital number, since it uses as much as digits as its factorization.

1210421303989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797904695.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 1210421303989 in words is "one trillion, two hundred ten billion, four hundred twenty-one million, three hundred three thousand, nine hundred eighty-nine".