1321212103 has 8 divisors (see below), whose sum is σ = 1400645088. Its totient is φ = 1241969664.

The previous prime is 1321212089. The next prime is 1321212119. The reversal of 1321212103 is 3012121231.

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-1321212103 is a prime.

It is a super-2 number, since 2×1321212103² = 3491202842227365218, which 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 (1321212203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33226 + ... + 61207.

It is an arithmetic number, because the mean of its divisors is an integer number (175080636).

Almost surely, 2^1321212103 is an apocalyptic number.

1321212103 is a deficient number, since it is larger than the sum of its proper divisors (79432985).

1321212103 is an equidigital number, since it uses as much as digits as its factorization.

1321212103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95273.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1321212103 is about 36348.4814400822. The cubic root of 1321212103 is about 1097.2969729413.

Adding to 1321212103 its reverse (3012121231), we get a palindrome (4333333334).

The spelling of 1321212103 in words is "one billion, three hundred twenty-one million, two hundred twelve thousand, one hundred three".