1021431210239 has 16 divisors (see below), whose sum is σ = 1183897399680. Its totient is φ = 871479992160.

The previous prime is 1021431210211. The next prime is 1021431210269. The reversal of 1021431210239 is 9320121341201.

It is a cyclic number.

It is not a de Polignac number, because 1021431210239 - 2²⁸ = 1021162774783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021431210269) 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 in 15 ways as a sum of consecutive naturals, for example, 22815164 + ... + 22859889.

It is an arithmetic number, because the mean of its divisors is an integer number (73993587480).

Almost surely, 2^{1021431210239} is an apocalyptic number.

1021431210239 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1021431210239 is a deficient number, since it is larger than the sum of its proper divisors (162466189441).

1021431210239 is a wasteful number, since it uses less digits than its factorization.

1021431210239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45675190.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 1021431210239 in words is "one trillion, twenty-one billion, four hundred thirty-one million, two hundred ten thousand, two hundred thirty-nine".