992001021 has 16 divisors (see below), whose sum is σ = 1448409600. Its totient is φ = 598921520.

The previous prime is 992001019. The next prime is 992001029. The reversal of 992001021 is 120100299.

It is a cyclic number.

It is not a de Polignac number, because 992001021 - 2¹ = 992001019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 992000982 and 992001000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (992001029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48471 + ... + 65828.

It is an arithmetic number, because the mean of its divisors is an integer number (90525600).

Almost surely, 2^992001021 is an apocalyptic number.

It is an amenable number.

992001021 is a deficient number, since it is larger than the sum of its proper divisors (456408579).

992001021 is a wasteful number, since it uses less digits than its factorization.

992001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114576.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 992001021 is about 31496.0477044343. The cubic root of 992001021 is about 997.3265326082.

The spelling of 992001021 in words is "nine hundred ninety-two million, one thousand, twenty-one".