1002122021 has 8 divisors (see below), whose sum is σ = 1019636640. Its totient is φ = 984625168.

The previous prime is 1002121963. The next prime is 1002122047. The reversal of 1002122021 is 1202212001.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1002122021 - 2²² = 997927717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1002121993 and 1002122011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002122071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164390 + ... + 170376.

It is an arithmetic number, because the mean of its divisors is an integer number (127454580).

Almost surely, 2^1002122021 is an apocalyptic number.

It is an amenable number.

1002122021 is a deficient number, since it is larger than the sum of its proper divisors (17514619).

1002122021 is an equidigital number, since it uses as much as digits as its factorization.

1002122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8883.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1002122021 is about 31656.3109189937. The cubic root of 1002122021 is about 1000.7068405920.

Adding to 1002122021 its reverse (1202212001), we get a palindrome (2204334022).

The spelling of 1002122021 in words is "one billion, two million, one hundred twenty-two thousand, twenty-one".