1020011021993 has 16 divisors (see below), whose sum is σ = 1056389817600. Its totient is φ = 984397237824.

The previous prime is 1020011021959. The next prime is 1020011022049. The reversal of 1020011021993 is 3991201100201.

It is a cyclic number.

It is not a de Polignac number, because 1020011021993 - 2¹⁶ = 1020010956457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020011021903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186380 + ... + 1440402.

It is an arithmetic number, because the mean of its divisors is an integer number (66024363600).

Almost surely, 2^{1020011021993} is an apocalyptic number.

It is an amenable number.

1020011021993 is a deficient number, since it is larger than the sum of its proper divisors (36378795607).

1020011021993 is a wasteful number, since it uses less digits than its factorization.

1020011021993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254328.

The product of its (nonzero) digits is 972, while the sum is 29.

The spelling of 1020011021993 in words is "one trillion, twenty billion, eleven million, twenty-one thousand, nine hundred ninety-three".