1021431210269 has 2 divisors, whose sum is σ = 1021431210270. Its totient is φ = 1021431210268.

The previous prime is 1021431210211. The next prime is 1021431210287. The reversal of 1021431210269 is 9620121341201.

1021431210269 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1018559322169 + 2871888100 = 1009237^2 + 53590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021431210269 is a prime.

It is a super-2 number, since 2×1021431210269² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021431210169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510715605134 + 510715605135.

It is an arithmetic number, because the mean of its divisors is an integer number (510715605135).

Almost surely, 2^{1021431210269} is an apocalyptic number.

It is an amenable number.

1021431210269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021431210269 is an equidigital number, since it uses as much as digits as its factorization.

1021431210269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The spelling of 1021431210269 in words is "one trillion, twenty-one billion, four hundred thirty-one million, two hundred ten thousand, two hundred sixty-nine".