1120021993 has 2 divisors, whose sum is σ = 1120021994. Its totient is φ = 1120021992.

The previous prime is 1120021951. The next prime is 1120022009. The reversal of 1120021993 is 3991200211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 827885529 + 292136464 = 28773^2 + 17092^2 .

It is a cyclic number.

It is not a de Polignac number, because 1120021993 - 2¹⁷ = 1119890921 is a prime.

It is not a weakly prime, because it can be changed into another prime (1120021933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560010996 + 560010997.

It is an arithmetic number, because the mean of its divisors is an integer number (560010997).

Almost surely, 2^1120021993 is an apocalyptic number.

It is an amenable number.

1120021993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1120021993 is an equidigital number, since it uses as much as digits as its factorization.

1120021993 is an evil number, because the sum of its binary digits is even.

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

The square root of 1120021993 is about 33466.7296430350. The cubic root of 1120021993 is about 1038.5056178568.

The spelling of 1120021993 in words is "one billion, one hundred twenty million, twenty-one thousand, nine hundred ninety-three".