21002202001 has 8 divisors (see below), whose sum is σ = 22912845408. Its totient is φ = 19091784000.

The previous prime is 21002201977. The next prime is 21002202041. The reversal of 21002202001 is 10020220012.

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 21002202001 - 2³¹ = 18854718353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002202041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182521 + ... + 274441.

It is an arithmetic number, because the mean of its divisors is an integer number (2864105676).

Almost surely, 2^21002202001 is an apocalyptic number.

It is an amenable number.

21002202001 is a deficient number, since it is larger than the sum of its proper divisors (1910643407).

21002202001 is a wasteful number, since it uses less digits than its factorization.

21002202001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112703.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21002202001 its reverse (10020220012), we get a palindrome (31022422013).

The spelling of 21002202001 in words is "twenty-one billion, two million, two hundred two thousand, one".