1020121000993 has 4 divisors (see below), whose sum is σ = 1024499202948. Its totient is φ = 1015742799040.

The previous prime is 1020121000949. The next prime is 1020121001027. The reversal of 1020121000993 is 3990001210201.

1020121000993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 661305624849 + 358815376144 = 813207^2 + 599012^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020121000993 - 2²⁵ = 1020087446561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020121030993) 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, 2189100628 + ... + 2189101093.

It is an arithmetic number, because the mean of its divisors is an integer number (256124800737).

Almost surely, 2^{1020121000993} is an apocalyptic number.

It is an amenable number.

1020121000993 is a deficient number, since it is larger than the sum of its proper divisors (4378201955).

1020121000993 is an equidigital number, since it uses as much as digits as its factorization.

1020121000993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4378201954.

The product of its (nonzero) digits is 972, while the sum is 28.

The spelling of 1020121000993 in words is "one trillion, twenty billion, one hundred twenty-one million, nine hundred ninety-three", and thus it is an aban number.