1020201211993 has 2 divisors, whose sum is σ = 1020201211994. Its totient is φ = 1020201211992.

The previous prime is 1020201211937. The next prime is 1020201212021. The reversal of 1020201211993 is 3991121020201.

1020201211993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 529013292889 + 491187919104 = 727333^2 + 700848^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020201211993 - 2⁹ = 1020201211481 is a prime.

It is a super-2 number, since 2×1020201211993² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1020201211193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510100605996 + 510100605997.

It is an arithmetic number, because the mean of its divisors is an integer number (510100605997).

Almost surely, 2^{1020201211993} is an apocalyptic number.

It is an amenable number.

1020201211993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020201211993 is an equidigital number, since it uses as much as digits as its factorization.

1020201211993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 31.

The spelling of 1020201211993 in words is "one trillion, twenty billion, two hundred one million, two hundred eleven thousand, nine hundred ninety-three".