122021993 has 2 divisors, whose sum is σ = 122021994. Its totient is φ = 122021992.

The previous prime is 122021987. The next prime is 122022001. The reversal of 122021993 is 399120221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121705024 + 316969 = 11032^2 + 563^2 .

It is a cyclic number.

It is not a de Polignac number, because 122021993 - 2²⁰ = 120973417 is a prime.

It is not a weakly prime, because it can be changed into another prime (122021093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61010996 + 61010997.

It is an arithmetic number, because the mean of its divisors is an integer number (61010997).

Almost surely, 2^122021993 is an apocalyptic number.

It is an amenable number.

122021993 is a deficient number, since it is larger than the sum of its proper divisors (1).

122021993 is an equidigital number, since it uses as much as digits as its factorization.

122021993 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 29.

The square root of 122021993 is about 11046.3565486544. The cubic root of 122021993 is about 495.9973673659.

The spelling of 122021993 in words is "one hundred twenty-two million, twenty-one thousand, nine hundred ninety-three".