1021155045403 has 2 divisors, whose sum is σ = 1021155045404. Its totient is φ = 1021155045402.

The previous prime is 1021155045389. The next prime is 1021155045479. The reversal of 1021155045403 is 3045405511201.

1021155045403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (3045405511201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1021155045403 - 2²⁵ = 1021121490971 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021155045203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510577522701 + 510577522702.

It is an arithmetic number, because the mean of its divisors is an integer number (510577522702).

Almost surely, 2^{1021155045403} is an apocalyptic number.

1021155045403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021155045403 is an equidigital number, since it uses as much as digits as its factorization.

1021155045403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 1021155045403 in words is "one trillion, twenty-one billion, one hundred fifty-five million, forty-five thousand, four hundred three".