3121211032403 has 2 divisors, whose sum is σ = 3121211032404. Its totient is φ = 3121211032402.

The previous prime is 3121211032399. The next prime is 3121211032427. The reversal of 3121211032403 is 3042301121213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3121211032403 - 2² = 3121211032399 is a prime.

It is a super-2 number, since 2×3121211032403² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3121211032453) 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 as a sum of consecutive naturals, namely, 1560605516201 + 1560605516202.

It is an arithmetic number, because the mean of its divisors is an integer number (1560605516202).

Almost surely, 2^{3121211032403} is an apocalyptic number.

3121211032403 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121211032403 is an equidigital number, since it uses as much as digits as its factorization.

3121211032403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 3121211032403 its reverse (3042301121213), we get a palindrome (6163512153616).

The spelling of 3121211032403 in words is "three trillion, one hundred twenty-one billion, two hundred eleven million, thirty-two thousand, four hundred three".