1022000021 has 8 divisors (see below), whose sum is σ = 1168246464. Its totient is φ = 875815200.

The previous prime is 1021999997. The next prime is 1022000027. The reversal of 1022000021 is 1200002201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022000021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021999972 and 1022000008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022000027) 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 7 ways as a sum of consecutive naturals, for example, 28481 + ... + 53433.

It is an arithmetic number, because the mean of its divisors is an integer number (146030808).

Almost surely, 2^1022000021 is an apocalyptic number.

It is an amenable number.

1022000021 is a deficient number, since it is larger than the sum of its proper divisors (146246443).

1022000021 is an equidigital number, since it uses as much as digits as its factorization.

1022000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30811.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1022000021 is about 31968.7350547375. The cubic root of 1022000021 is about 1007.2802102514.

Adding to 1022000021 its reverse (1200002201), we get a palindrome (2222002222).

The spelling of 1022000021 in words is "one billion, twenty-two million, twenty-one", and thus it is an aban number and an uban number.