1023431205001 has 4 divisors (see below), whose sum is σ = 1025862158404. Its totient is φ = 1021000251600.

The previous prime is 1023431204981. The next prime is 1023431205011. The reversal of 1023431205001 is 1005021343201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 356838969600 + 666592235401 = 597360^2 + 816451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023431205001 is a prime.

It is a super-2 number, since 2×1023431205001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1023431205011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1215476070 + ... + 1215476911.

It is an arithmetic number, because the mean of its divisors is an integer number (256465539601).

Almost surely, 2^{1023431205001} is an apocalyptic number.

It is an amenable number.

1023431205001 is a deficient number, since it is larger than the sum of its proper divisors (2430953403).

1023431205001 is an equidigital number, since it uses as much as digits as its factorization.

1023431205001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430953402.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 1023431205001 its reverse (1005021343201), we get a palindrome (2028452548202).

The spelling of 1023431205001 in words is "one trillion, twenty-three billion, four hundred thirty-one million, two hundred five thousand, one".