1020121111403 has 2 divisors, whose sum is σ = 1020121111404. Its totient is φ = 1020121111402.

The previous prime is 1020121111393. The next prime is 1020121111507. The reversal of 1020121111403 is 3041111210201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020121111403 - 2¹⁸ = 1020120849259 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1020121111703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510060555701 + 510060555702.

It is an arithmetic number, because the mean of its divisors is an integer number (510060555702).

Almost surely, 2^{1020121111403} is an apocalyptic number.

1020121111403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020121111403 is an equidigital number, since it uses as much as digits as its factorization.

1020121111403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1020121111403 its reverse (3041111210201), we get a palindrome (4061232321604).

The spelling of 1020121111403 in words is "one trillion, twenty billion, one hundred twenty-one million, one hundred eleven thousand, four hundred three".