1043431021123 has 2 divisors, whose sum is σ = 1043431021124. Its totient is φ = 1043431021122.

The previous prime is 1043431021117. The next prime is 1043431021153. The reversal of 1043431021123 is 3211201343401.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1043431021123 - 2²⁵ = 1043397466691 is a prime.

It is a super-2 number, since 2×1043431021123² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1043431021153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521715510561 + 521715510562.

It is an arithmetic number, because the mean of its divisors is an integer number (521715510562).

Almost surely, 2^{1043431021123} is an apocalyptic number.

1043431021123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1043431021123 is an equidigital number, since it uses as much as digits as its factorization.

1043431021123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 1043431021123 its reverse (3211201343401), we get a palindrome (4254632364524).

The spelling of 1043431021123 in words is "one trillion, forty-three billion, four hundred thirty-one million, twenty-one thousand, one hundred twenty-three".