1020412321993 has 4 divisors (see below), whose sum is σ = 1020482958100. Its totient is φ = 1020341685888.

The previous prime is 1020412321991. The next prime is 1020412322081. The reversal of 1020412321993 is 3991232140201.

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 944265023289 + 76147298704 = 971733^2 + 275948^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020412321993 - 2¹ = 1020412321991 is a prime.

It is a super-2 number, since 2×1020412321993² (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 (1020412321991) 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, 35296380 + ... + 35325277.

It is an arithmetic number, because the mean of its divisors is an integer number (255120739525).

Almost surely, 2^{1020412321993} is an apocalyptic number.

It is an amenable number.

1020412321993 is a deficient number, since it is larger than the sum of its proper divisors (70636107).

1020412321993 is an equidigital number, since it uses as much as digits as its factorization.

1020412321993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70636106.

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 1020412321993 in words is "one trillion, twenty billion, four hundred twelve million, three hundred twenty-one thousand, nine hundred ninety-three".