1022201989 has 4 divisors (see below), whose sum is σ = 1026589356. Its totient is φ = 1017814624.

The previous prime is 1022201951. The next prime is 1022202001. The reversal of 1022201989 is 9891022201.

1022201989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9891022201 = 587 ⋅16850123.

It can be written as a sum of positive squares in 2 ways, for example, as 178008964 + 844193025 = 13342^2 + 29055^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022201989 - 2¹⁵ = 1022169221 is a prime.

It is a super-2 number, since 2×1022201989² = 2089793812631112242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022201909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2193334 + ... + 2193799.

It is an arithmetic number, because the mean of its divisors is an integer number (256647339).

Almost surely, 2^1022201989 is an apocalyptic number.

It is an amenable number.

1022201989 is a deficient number, since it is larger than the sum of its proper divisors (4387367).

1022201989 is an equidigital number, since it uses as much as digits as its factorization.

1022201989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4387366.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 1022201989 is about 31971.8937349667. The cubic root of 1022201989 is about 1007.3465589030.

The spelling of 1022201989 in words is "one billion, twenty-two million, two hundred one thousand, nine hundred eighty-nine".