1021102201993 has 2 divisors, whose sum is σ = 1021102201994. Its totient is φ = 1021102201992.

The previous prime is 1021102201967. The next prime is 1021102202023. The reversal of 1021102201993 is 3991022011201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 693869008144 + 327233193849 = 832988^2 + 572043^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021102201993 - 2¹³ = 1021102193801 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021102201963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510551100996 + 510551100997.

It is an arithmetic number, because the mean of its divisors is an integer number (510551100997).

Almost surely, 2^{1021102201993} is an apocalyptic number.

It is an amenable number.

1021102201993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021102201993 is an equidigital number, since it uses as much as digits as its factorization.

1021102201993 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 1021102201993 in words is "one trillion, twenty-one billion, one hundred two million, two hundred one thousand, nine hundred ninety-three".