21002202011 has 8 divisors (see below), whose sum is σ = 24024606720. Its totient is φ = 17985319848.

The previous prime is 21002201977. The next prime is 21002202041. The reversal of 21002202011 is 11020220012.

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 21002202011 - 2¹⁴ = 21002185627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21002201983 and 21002202001.

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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1372481 + ... + 1387698.

It is an arithmetic number, because the mean of its divisors is an integer number (3003075840).

Almost surely, 2^21002202011 is an apocalyptic number.

21002202011 is a deficient number, since it is larger than the sum of its proper divisors (3022404709).

21002202011 is a wasteful number, since it uses less digits than its factorization.

21002202011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2761273.

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

Adding to 21002202011 its reverse (11020220012), we get a palindrome (32022422023).

The spelling of 21002202011 in words is "twenty-one billion, two million, two hundred two thousand, eleven".