20211021002 has 8 divisors (see below), whose sum is σ = 30830371200. Its totient is φ = 9934230604.

The previous prime is 20211020969. The next prime is 20211021043. The reversal of 20211021002 is 20012011202.

It is a happy number.

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, 85639802 + ... + 85640037.

It is an arithmetic number, because the mean of its divisors is an integer number (3853796400).

Almost surely, 2^20211021002 is an apocalyptic number.

20211021002 is a deficient number, since it is larger than the sum of its proper divisors (10619350198).

20211021002 is a wasteful number, since it uses less digits than its factorization.

20211021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171279900.

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

Adding to 20211021002 its reverse (20012011202), we get a palindrome (40223032204).

The spelling of 20211021002 in words is "twenty billion, two hundred eleven million, twenty-one thousand, two".