1021221002 has 16 divisors (see below), whose sum is σ = 1546850952. Its totient is φ = 505612800.

The previous prime is 1021220969. The next prime is 1021221041. The reversal of 1021221002 is 2001221201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 281870521 + 739350481 = 16789^2 + 27191^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428438 + ... + 430814.

Almost surely, 2^1021221002 is an apocalyptic number.

1021221002 is a deficient number, since it is larger than the sum of its proper divisors (525629950).

1021221002 is a wasteful number, since it uses less digits than its factorization.

1021221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4393.

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

The square root of 1021221002 is about 31956.5486559484. The cubic root of 1021221002 is about 1007.0242122517.

Adding to 1021221002 its reverse (2001221201), we get a palindrome (3022442203).

The spelling of 1021221002 in words is "one billion, twenty-one million, two hundred twenty-one thousand, two".