801236992021 has 2 divisors, whose sum is σ = 801236992022. Its totient is φ = 801236992020.

The previous prime is 801236991979. The next prime is 801236992091. The reversal of 801236992021 is 120299632108.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 673277686225 + 127959305796 = 820535^2 + 357714^2 .

It is a cyclic number.

It is not a de Polignac number, because 801236992021 - 2¹⁵ = 801236959253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (801236992091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400618496010 + 400618496011.

It is an arithmetic number, because the mean of its divisors is an integer number (400618496011).

Almost surely, 2^801236992021 is an apocalyptic number.

It is an amenable number.

801236992021 is a deficient number, since it is larger than the sum of its proper divisors (1).

801236992021 is an equidigital number, since it uses as much as digits as its factorization.

801236992021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 801236992021 in words is "eight hundred one billion, two hundred thirty-six million, nine hundred ninety-two thousand, twenty-one".