1020204312431 has 2 divisors, whose sum is σ = 1020204312432. Its totient is φ = 1020204312430.

The previous prime is 1020204312383. The next prime is 1020204312529. The reversal of 1020204312431 is 1342134020201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020204312431 - 2¹⁴ = 1020204296047 is a prime.

It is a super-2 number, since 2×1020204312431² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1020204312397 and 1020204312406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020204312731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510102156215 + 510102156216.

It is an arithmetic number, because the mean of its divisors is an integer number (510102156216).

Almost surely, 2^{1020204312431} is an apocalyptic number.

1020204312431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020204312431 is an equidigital number, since it uses as much as digits as its factorization.

1020204312431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 1020204312431 its reverse (1342134020201), we get a palindrome (2362338332632).

The spelling of 1020204312431 in words is "one trillion, twenty billion, two hundred four million, three hundred twelve thousand, four hundred thirty-one".