1721021002 has 8 divisors (see below), whose sum is σ = 2644495812. Its totient is φ = 839522400.

The previous prime is 1721020991. The next prime is 1721021021. The reversal of 1721021002 is 2001201271.

It can be written as a sum of positive squares in 2 ways, for example, as 1703955841 + 17065161 = 41279^2 + 4131^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10493949 + ... + 10494112.

Almost surely, 2^1721021002 is an apocalyptic number.

1721021002 is a deficient number, since it is larger than the sum of its proper divisors (923474810).

1721021002 is a wasteful number, since it uses less digits than its factorization.

1721021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20988104.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 1721021002 is about 41485.1901526316. The cubic root of 1721021002 is about 1198.3823114200.

Adding to 1721021002 its reverse (2001201271), we get a palindrome (3722222273).

The spelling of 1721021002 in words is "one billion, seven hundred twenty-one million, twenty-one thousand, two".